if 7 f(x) dx = 8 1 and 7 f(x) dx = 5.6, 5 find 5 f(x) dx. 1

To model this situation, we can use the exponential growth equation:

N(t) = N0 * e^(rt)

where N(t) is the population at time t, N0 is the initial population, e is the base of the natural logarithm (approximately equal to 2.718), r is the growth rate, and t is the time elapsed.

We can use the given information to solve for r:

34,556 = 32,600 * e^(r*1)

e^(r*1) = 34,556 / 32,600

e^(r*1) = 1.0604

r = ln(1.0604)

r ≈ 0.0599

So the function that models the population of bacteria in the petri dish is:

N(t) = 32,600 * e^(0.0599t)

To determine the percent increase of the bacteria each hour, we can use the formula:

percent increase = [(new population - old population) / old population] * 100%

For the first hour, the old population is 32,600 and the new population is 34,556, so:

percent increase = [(34,556 - 32,600) / 32,600] * 100%

percent increase ≈ 5.98%

Therefore, the bacteria population is increasing by approximately 5.98% each hour.

Answer:

3 hours minus 15 minutes = 2 hours 45 minutes (2.75 hours)

(2.75 mph)(2.75 hours) = 7.5625 miles

The hexadecimal addition of CA10 and 4F57 directly in hexadecimal is B197.

Hi! I'd be happy to help you carry out the hexadecimal addition of CA10 and 4F57 directly in hexadecimal. Here are the steps:

1. Write down the two hexadecimal numbers one below the other, with the least significant digits (rightmost digits) aligned:
  CA10
+ 4F57

2. Perform column-wise addition starting from the rightmost column (least significant digit):
  0 + 7 = 7

3. Move to the next column and add the corresponding digits. If the sum exceeds 15 (F in hexadecimal), carry over the excess to the next column:
  1 + 5 = 6 (no carry over needed)

4. Continue the addition for the remaining columns, remembering to carry over when necessary:
  A + F = 19 (in hexadecimal, this is 13); carry over the 1
  1 + C + 4 = 11 (in hexadecimal, this is B)

5. Combine the results from each column to obtain the final sum: B197

So, the hexadecimal addition of CA10 and 4F57 directly in hexadecimal is B197.

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Answer: $24

Step-by-step explanation: (30*80)/100

The equation of the tangent plane to z = ln(2x y) at (1, 3) is x + (1/3)y - z + ln(2) + ln(3) = 0.

To find the equation of the tangent plane to the surface z = ln(2xy) at the point (1, 3), we need to find the partial derivatives of z with respect to x and y at (1, 3), which are:

∂z/∂x = 1/x

∂z/∂y = 1/y

Evaluating these partial derivatives at (1, 3), we get:

∂z/∂x(1, 3) = 1/1 = 1

∂z/∂y(1, 3) = 1/3

So the normal vector to the tangent plane at (1, 3) is given by:

N = <1, 1/3, -1>

Now we need to find the constant term in the equation of the plane. To do this, we substitute the coordinates of the point (1, 3) into the equation of the surface:

z = ln(2xy) = ln(2(1)(3)) = ln(6)

So the equation of the tangent plane is:

x + (1/3)(y - 3) - z + ln(6) = 0

Simplifying, we get:

x + (1/3)y - z + ln(2) + ln(3) = 0

So the equation of the tangent plane to the surface z = ln(2xy) at the point (1, 3) is x + (1/3)y - z + ln(2) + ln(3) = 0.

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Answer:

2210in^3

Step-by-step explanation:

since volume= length *width *height

and area= length * width

u alr know area

so if area=l*w

and area= 130

then 130=l*w

so subsittute 130 for length and width

volume=(130*17)

=2210in^3

Answer:

Step-by-step explanation:

Volume  = Area x Height

Area = 130 in^2

Height = 17 in

Volume = 130 x 17

Volume = 2210

Based on the options provided, the roots of the quadratic equation associated with the graph are -6 and 3, as they are the values where the graph intersects the x-axis. Thus, option A is correct.

In a quadratic equation in the form of [tex]"ax^2 + bx + c = 0"[/tex]  , the roots (or solutions) can be determined from the x-intercepts of the associated graph of the quadratic equation.

which represent the points where the graph intersects the x-axis. These points are also known as the "zeros" or "roots" of the quadratic equation.

In the case of the values -6 and 3 that you mentioned, they are the x-intercepts or zeros of the graph. This means that when you plug in -6 and 3 into the equation or function that corresponds to the graph, the result is zero.

Based on the options provided, the roots of the quadratic equation associated with the graph are -6 and 3, as they are the values where the graph intersects the x-axis.

Therefore, option a.  [tex]-6[/tex] and  [tex]3 i[/tex]s the correct answer.

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Answer:

(a) The bias of the estimator for σ^2, denoted as MSE(σ^2), is defined as the difference between the expected value of the estimator and the true value of the parameter. In this case, the estimator is (n-1)s^2 / k, where n is the sample size, s^2 is the sample variance, and k is a constant greater than 0.

The expected value of the sample variance s^2 is equal to the true variance σ^2, since s^2 is an unbiased estimator of σ^2. Therefore, the bias of the estimator for σ^2 is given by:

Bias(σ^2) = E[(n-1)s^2 / k] - σ^2

Now substituting the value of s^2, we get:

Bias(σ^2) = E[(n-1)(σ^2) / k] - σ^2

Simplifying further:

Bias(σ^2) = (n-1)σ^2 / k - σ^2

(b) The variance of the estimator for σ^2, denoted as Var(σ^2), is given by the variance of the sample variance s^2, which can be calculated as:

Var(σ^2) = Var[(n-1)s^2 / k]

Since s^2 is an unbiased estimator of σ^2, Var[(n-1)s^2] = 2(n-1)^2σ^4 / (k^2(n-3)), using the known formula for the variance of sample variance.

Therefore, substituting the value of Var[(n-1)s^2] into the equation, we get:

Var(σ^2) = 2(n-1)^2σ^4 / (k^2(n-3))

(c) The mean squared error (MSE) of the estimator for σ^2, denoted as MSE(σ^2), is the sum of the variance and the square of the bias:

MSE(σ^2) = Var(σ^2) + Bias(σ^2)^2

Substituting the values of Var(σ^2) and Bias(σ^2) from parts (a) and (b), respectively, we get:

MSE(σ^2) = 2(n-1)^2σ^4 / (k^2(n-3)) + [(n-1)σ^2 / k - σ^2]^2

(d) To minimize the mean squared error of the estimator, we need to find the value of k that minimizes the MSE(σ^2). This can be done by taking the derivative of the MSE(σ^2) with respect to k, setting it equal to zero, and solving for k. However, since the equation for MSE(σ^2) is quite complex, it may not have a simple closed-form solution for k. In practice, numerical optimization techniques can be used to find the value of k that minimizes the MSE(σ^2) by iterating over a range of possible values for k and calculating the corresponding MSE(σ^2) for each value. The value of k that gives the lowest MSE(σ^2) can then be chosen as the optimal value.

The volume of the solid obtained by rotating the region bounded by y=0, y=cos(2x), x=π/4, and x=0 about the axis y=-5 is approximately 16.47 cubic units.

To solve this problem, we need to use the method of cylindrical shells. We need to integrate the volume of a cylindrical shell that has height dy, radius r, and thickness dx. The radius r is the distance between the axis of rotation and the curve y=cos(2x).

Since the axis of rotation is y=-5, we need to find the distance between y=-5 and the curve y=cos(2x).

y = cos(2x)

-5 - cos(2x) = r

We need to solve for x in terms of y, so we use the inverse cosine function

2x = arccos(y)

x = 1/2 arccos(y)

Now we can set up the integral for the volume

V = ∫[π/4,0] ∫[-5-cos(2x),-5] 2πr dx dy

V = ∫[π/4,0] ∫[-5-cos(2x),-5] 2π(-5-cos(2x)-(-5)) dx dy

V = ∫[π/4,0] ∫[-5-cos(2x),-5] 2π(5+cos(2x)) dx dy

V = ∫[π/4,0] [2π(5x+xsin(2x)+C)]|-5-cos(2x),-5] dy

V = ∫[π/4,0] 2π(5+5sin(2x)-5cos(2x)-π/2) dy

V = 5π² - 25π/2

v = 16.47 cubic units.

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Answer:

5.2

Step-by-step explanation:

2/5 = .4

3/5 = .6

.4(1) + .6(8)

.4 + 4.8 = 5.2

Helping in  the name of Jesus.

To estimate the total volume within 60 cubic feet with a 95% confidence interval using a ratio estimate, one should sample approximately 27 trees.

To determine the required sample size, follow these steps:

1. Identify the desired confidence level (95% in this case).
2. Determine the acceptable margin of error (e.g., 5%).
3. Calculate the population variance (σ²) and mean (µ) from a pilot study or prior data.
4. Use the formula for sample size estimation in ratio estimation: n = (Z² × σ² × (µ/R)²) / E², where n is the sample size, Z is the critical value from the standard normal distribution corresponding to the desired confidence level (1.96 for 95%), σ² is the population variance, µ is the population mean, R is the desired ratio, and E is the acceptable margin of error.

By plugging the given values and solving for n, one can determine the necessary sample size of approximately 27 trees to achieve a 95% confidence interval for the total volume within 60 cubic feet using a ratio estimate.

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Answer:the probability is 42%

Step-by-step explanation:

k

For each odd natural number n with n >= 3, (1 + 1/2) (1 - 1/3) (1 + 1/4) .... (1 + (-1)^n/n) = 1.

We will use mathematical induction to prove the given statement for all odd natural numbers greater than or equal to 3.

Base case: Let n = 3. Then we have (1 + 1/2)(1 - 1/3) = (3/2) * (2/3) = 1, which satisfies the equation.

Inductive step: Assume the equation holds for some odd natural number k >= 3, i.e., (1 + 1/2) (1 - 1/3) (1 + 1/4) .... (1 + (-1)^k/k) = 1.

We will prove that the equation also holds for k+2.

We can rewrite the product for k+2 as:

(1 + 1/2) (1 - 1/3) (1 + 1/4) .... (1 - 1/(k+1)) (1 + 1/(k+2)) (1 - 1/(k+3))

Using the assumption, we can replace the first k terms with 1.

Thus, we get:

(1) (1 + 1/(k+2)) (1 - 1/(k+3)) = 1 * [(k+4)/(k+2)] * [(k+2)/(k+3)] = (k+4)/(k+3)

Therefore, the equation holds for k+2 as well. By mathematical induction, the statement holds for all odd natural numbers greater than or equal to 3.

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Answer:

So it would not be 6 cm because, that's like the size of a couple paper clips! it's not 6 millimeters either because that's very very small! 6 kilometers is ALOT! Do it would be 6 meters! A meter is about the length of a door frame! I hoped this helped! Good luck on that IXL!

Answer:

a. Discrete

b. Continuous

c. Continuous

d. Discrete

e. Discrete

f. Continuous

g. Discrete

h. Continuous

i. Continuous

j. Discrete

Step-by-step explanation:

a. The number of fence posts in a garden is a discrete data because it is a countable quantity and cannot be measured or subdivided. It can only take on integer values.

b. The length, in meters, of each car in a car park is a continuous data because it can take on any value within a certain range. It can be measured more accurately and can be subdivided into smaller units.

c. The weights of pineapples in a box is continuous data because it can take on any value within a certain range. It can be measured more accurately and can be subdivided into smaller units.

d. The number of pineapples in a box is discrete data because it is a countable quantity and cannot be measured or subdivided. It can only take on integer values.

e. The number of chairs in a classroom is discrete data because it is a countable quantity and cannot be measured or subdivided. It can only take on integer values.

f. The heights of the students in a classroom is continuous data because it can take on any value within a certain range. It can be measured more accurately and can be subdivided into smaller units.

g. The number of mobile phones sold in one day is discrete data because it is a countable quantity and cannot be measured or subdivided. It can only take on integer values.

h. The time it takes to complete a crossword puzzle is continuous data because it can take on any value within a certain range. It can be measured more accurately and can be subdivided into smaller units.

i. The waist sizes of trousers sold in a shop is continuous data because it can take on any value within a certain range. It can be measured more accurately and can be subdivided into smaller units.

j. The number of pairs of trousers sold in a shop is discrete data because it is a countable quantity and cannot be measured or subdivided. It can only take on integer values.

The volume of the described solid is (490/7) π h^3.

The formula for the volume of a right circular cone is:

V = 1/3 πr^2h

In this case, the cone has height 4h and base radius 7r. We need to express the volume in terms of h and r. Since the base radius is 7r, we can write:

r = (1/7) b

where b is the radius of the base of the cone. To find b, we use the fact that the height of the cone is 4h and the base radius is 7r:

h^2 + r^2 = (4h)^2

Substituting r = (1/7) b, we get:

h^2 + (1/49) b^2 = 16h^2

Solving for b, we get:

b^2 = 49(16h^2 - h^2) = 49(15h^2) = 735h^2

Therefore, b = sqrt(735)h, and the volume of the cone is:

V = 1/3 πr^2h = 1/3 π(49/49) b^2 (1/7) 4h = (2/21) π (735h^3)

Simplifying, we get:

V = (490/7) π h^3

Therefore, the volume of the described solid is (490/7) π h^3.

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The equation of the plane that passes through the point P0(-8, 3, -8) and is perpendicular to the line with parametric equations x = -8 + t, y = 3 + 4t, z = 3t, where -∞ < t < +∞, is given by the equation: 4x + y - z = 35.

To find the equation of the plane, we need to determine a normal vector to the plane. Since the plane is perpendicular to the given line, the direction vector of the line, <4, 1, -1>, will be perpendicular to the plane as well. This direction vector will serve as the normal vector of the plane.

Next, we substitute the coordinates of the point P0(-8, 3, -8) into the equation of the plane, along with the components of the normal vector. This gives us the equation:

4(x - (-8)) + 1(y - 3) - 1(z - (-8)) = 0.

Simplifying, we get:

4x + y - z = 35.

Therefore, the equation of the plane passing through P0(-8, 3, -8) and perpendicular to the given line is 4x + y - z = 35.

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The required P-value is 0.0014. The given statement "The P-value calculated for testing H0 : µ ≥ 5.4 versus H1 : µ < 5.4 is a small probability; hence, it is plausible that the mean number of sick days is at least 5.4" is false because a small P-value indicates that the null hypothesis (H0) is less likely to be true.

a. To find the P-value for testing H0: μ ≥ 5.4 versus H1: μ < 5.4, first calculate the test statistic:

Test statistic (z) = (Sample mean - Population mean) / (Standard deviation / √(Sample size))
z = (4.4 - 5.4) / (2.8 / √(80))
z ≈ -3.19

Now, use the z-table or a calculator to find the P-value corresponding to the test statistic:
P-value ≈ 0.0014 (rounded to four decimal places)

b. The statement "The P-value calculated for testing H0 : µ ≥ 5.4 versus H1 : µ < 5.4 is a small probability; hence, it is plausible that the mean number of sick days is at least 5.4" is FALSE.

A small P-value indicates that the null hypothesis (H0) is less likely to be true and we have evidence to support the alternative hypothesis (H1) that the mean number of sick days is less than 5.4.

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The required P-value is 0.0014. The given statement "The P-value calculated for testing H0 : µ ≥ 5.4 versus H1 : µ < 5.4 is a small probability; hence, it is plausible that the mean number of sick days is at least 5.4" is false because a small P-value indicates that the null hypothesis (H0) is less likely to be true.

a. To find the P-value for testing H0: μ ≥ 5.4 versus H1: μ < 5.4, first calculate the test statistic:

Test statistic (z) = (Sample mean - Population mean) / (Standard deviation / √(Sample size))
z = (4.4 - 5.4) / (2.8 / √(80))
z ≈ -3.19

Now, use the z-table or a calculator to find the P-value corresponding to the test statistic:
P-value ≈ 0.0014 (rounded to four decimal places)

b. The statement "The P-value calculated for testing H0 : µ ≥ 5.4 versus H1 : µ < 5.4 is a small probability; hence, it is plausible that the mean number of sick days is at least 5.4" is FALSE.

A small P-value indicates that the null hypothesis (H0) is less likely to be true and we have evidence to support the alternative hypothesis (H1) that the mean number of sick days is less than 5.4.

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The volume of the propane tank that has the shape of a cylinder would be =4,710m³

The propane tank has the shape of a cylinder with a given radius and height therefore the formula for the volume of a cylinder should be used to calculate it's volume.

To calculate the volume of a cylinder, the formula that should be used would be = πr²h

Where ;

radius = 10m

height = 15 m

Volume = 3.14 × 10×10× 15

= 4,710m³

Therefore,the volume of the propane tank that has the shape of a cylinder would be = 4710m³.

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To find two numbers that have a sum of 138 and a difference of 54, we can use a system of equations.

Let x be the larger number and y be the smaller number. Then we have:

x + y = 138 (equation 1)

x - y = 54 (equation 2)

We can solve this system of equations by adding equation 1 and equation 2:

2x = 192

Dividing both sides by 2, we get:

x = 96

Substituting x = 96 into equation 1, we get:

96 + y = 138

Subtracting 96 from both sides, we get:

y = 42

Therefore, the two numbers that have a sum of 138 and a difference of 54 are 96 and 42.

A graph of the linear equation y = 3x/2 - 5 in slope-intercept form is shown in the image attached below.

In order to to graph the solution to the given linear equation on a coordinate plane, we would use an online graphing calculator to plot the given linear equation and then take note of the point that lie on it;

y = 3x/2 - 5

Next, we would use an online graphing calculator to plot the given linear equation as shown in the graph attached below.

Based on the graph (see attachment), we can logically deduce that a possible solution for the linear equation is the ordered pairs (0, -5) and (3.333, 0), which corresponds to the y-intercept and x-intercept respectively.

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To reparametrize the curve with respect to arc length, we need to find the arc length function s(t) and then solve for t in terms of s.

The arc length function is given by:

s(t) = ∫√[r'(t)·r'(t)] dt

where r'(t) is the derivative of r(t) with respect to t.

We can calculate r'(t) as:

r'(t) = (2e^(2t)cos(2t) - 4e^(2t)sin(2t))i + (12e^(2t)sin(2t))j + (2e^(2t)sin(2t) + 6e^(2t)cos(2t))k

Now we can substitute this into the arc length formula and integrate:

s(t) = ∫√[(2e^(2t)cos(2t) - 4e^(2t)sin(2t))^2 + (12e^(2t)sin(2t))^2 + (2e^(2t)sin(2t) + 6e^(2t)cos(2t))^2] dt

This integral looks quite complicated, so we will use a numerical integration method to approximate s(t).

We can use the trapezoidal rule to numerically integrate s(t) between t = 0 and some value t = T:

s(T) ≈ ∑[s(iΔt) + s((i+1)Δt)]/2 * Δt

where Δt = T/n is the step size, and n is the number of intervals we use.

Once we have approximated s(t), we can solve for t in terms of s using numerical methods such as the bisection method or Newton's method.

For example, if we want to find the value of t that corresponds to s = 10, we can solve:

s(t) = 10

for t using numerical methods. Once we have t, we can plug it back into r(t) to get the reparametrized curve in terms of arc length s.

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We can see that this function is of the same order of magnitude as 1/n. Therefore, we can say that (n-1)/(6n) = Θ(1/n), and 1/n is a good reference function for this function.

To find good reference functions for each of the given functions using the big-Theta notation, we need to find a lower and an upper bound that is both of the same order of magnitude as the function.

i. 3n² + 5n(2n+7)

Expanding the expression inside the parentheses and simplifying, we get:

3n² + 10n² + 35n

= 13n² + 35n

We can see that this function is of the same order of magnitude as n^2. Therefore, we can say that 13n² + 35n = Θ(n²), and n² is a good reference function for this function.

ii. n(n+1)/2

Expanding and simplifying, we get:

n(n+1)/2 = (n² + n)/2

We can see that this function is of the same order of magnitude as n². Therefore, we can say that (n² + n)/2 = Θ(n²), and n² is a good reference function for this function.

iii. 3n + [tex]3n^6[/tex] + 5logn(2n)

We can see that the term [tex]3n^6[/tex] dominates the other terms for large values of n. Therefore, we can say that 3n + [tex]3n^6[/tex] + 5logn(2n) = Θ([tex]n^6[/tex]), and [tex]n^6[/tex] is a good reference function for this function.

iv. n(n-1)/(6n² + log2(n))

For large values of n, the logarithmic term becomes negligible compared to the quadratic term in the denominator. Therefore, we can approximate the function as:

n(n-1)/(6n² + log2(n)) ≈ n(n-1)/(6n²)

= (n-1)/(6n)

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The solutions manual for "Linear Algebra and its Applications" by Gilbert Strang can typically be found on online bookstores, such as Amazon or Barnes & Noble.

Alternatively, you may also be able to find a digital copy of the solutions manual through online forums or academic websites. It is important to note that obtaining unauthorized copies of copyrighted materials is illegal, so be sure to obtain the solutions manual through legitimate sources.

You can find the solutions manual for "Linear Algebra and its Applications" by Gilbert Strang on various online platforms, such as Amazon or the publisher's website. You can also check your local bookstore or academic library for a copy of the solutions manual.

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The value of g(5) is 20.899 when the function with first derivative is  g′(x)=√(x³ + x), option D is correct.

A differential equation is an equation that involves one or more functions and their derivatives.

To find the value of g(5), we need to integrate the given first derivative g′(x) and then evaluate the function g(x) at x = 5.

Let's find the antiderivative (integral) of g′(x):

∫√(x³ + x) dx

To evaluate this integral, we can use the substitution method.

Let u = x³ + x.

Differentiating both sides with respect to x, we get:

du/dx = 3x² + 1

dx = du / (3x² + 1)

Substituting these values, we have:

g(x) = ∫√u × (du / (3x² + 1))

Now, we can evaluate the integral in terms of u:

g(x) = ∫√u / (3x² + 1) du

To simplify this integral, let's express it in terms of u:

g(x) = ∫√u / (3x² + 1) du

To find g(x), we need to evaluate this integral.

Performing the integral, we have:

[tex]g(x) = (2/9) (3x^2 + 1)^(^3^/^2^) + C[/tex]

Now, we can apply the initial condition g(2) = -7:

[tex]-7 = (2/9) (3(2^2) + 1)^(^3^/^2^) + C[/tex]

[tex]-7 = (2/9)(13)^(^3^/^2^) + C[/tex]

Solving for C:

[tex]C = -7 - (2/9) (13)^(^3^/^2^)[/tex]

Now, we have the expression for g(x):

[tex]g(x) = (2/9)(3x^2 + 1)^(^3^/^2^) - (2/9)(13)^(^3^/^2^) - 7[/tex]

To find g(5), we substitute x = 5 into this expression:

[tex]g(5) = (2/9) (3(5^2) + 1)^(^3^/^2^) - (2/9)(13)^(^3^/^2^) - 7[/tex]

Calculating this expression, we find:

g(5) = 20.899

Hence, the value of g(5) is 20.899.

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Pair 1: (2, 4), Pair 2: (4, 6), Pair 3: (6, 8), Pair 4: (8, 10), Pair 5: (10, 12)

To create a paired data set with the given conditions, we need to have five pairs of observations where the average of y1 and y2 are not equal, and the standard errors for y1 and y2 are greater than 0, but the standard error of the differences (sed) is 0.

Step 1: Invent five pairs of observations
Here's a paired data set that meets these requirements:

Pair 1: (2, 4)
Pair 2: (4, 6)
Pair 3: (6, 8)
Pair 4: (8, 10)
Pair 5: (10, 12)

Step 2: Verify that y¯1 and y¯2 are not equal
Calculate the average of y1 values and y2 values:

y¯1 = (2+4+6+8+10)/5 = 30/5 = 6
y¯2 = (4+6+8+10+12)/5 = 40/5 = 8

Since y¯1 ≠ y¯2 (6 ≠ 8), this condition is met.

Step 3: Verify that sey¯1 > 0 and sey¯2 > 0
As the data sets have different values, it's evident that the standard errors for y1 and y2 are greater than 0.

Step 4: Verify that sed = 0
Calculate the differences (d) for each pair:

d1 = 4 - 2 = 2
d2 = 6 - 4 = 2
d3 = 8 - 6 = 2
d4 = 10 - 8 = 2
d5 = 12 - 10 = 2

Since all differences are the same (2), the standard error of the differences (sed) is 0.
So, the paired data set provided meets all the given conditions.

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Answer:

For Line T:

[tex]m = \frac{5 - 14}{2 - 0} = - \frac{9}{2} [/tex]

Since Lines T and R are perpendicular, the slopes of these two lines are negative reciprocals. So Line R has slope 2/9. We have:

[tex]3 = \frac{2}{9} (4) + b[/tex]

[tex] \frac{27}{9} = \frac{8}{9} + b[/tex]

[tex]b = \frac{19}{9} [/tex]

[tex]y = \frac{2}{9} x + \frac{19}{9} [/tex]

So the equation of Line R is

y = (2/9)x + (19/9)