In Mr. Britt's class the distribution of ages of his students has a mean of 115 months and a standard
deviation of 3.6 months.
If no students leave or join the class, what will be the mean and standard deviation of the distribution of
student's ages 4 months later?
Answers
Using statistical concepts, it is found that the mean will be of 119 months, while the standard deviation will be of 3.6 months, given by option C.
-------------------------------------
The mean of a data-set is the sum of all values divided by the number of values.The standard deviation is the square root of the sum of the difference squared of each observation and the mean, divided by the number of values.If x is added to all values of a data-set, it is also added to the mean, while the standard deviation remains constant.-------------------------------------
Mean of 115 months and standard deviation of 3.6 months.4 months later is the same as adding 4 to each observation.Thus, the mean will be of 115 + 4 = 119 months, while the standard deviation remains constant at 3.6 months.A similar problem is given at https://brainly.com/question/20640860
Answer:
Mean: 119119119 months
Standard deviation: 3.63.63, point, 6 months
Step-by-step explanation:
Related Questions
Simplify 12 + 3(2x - 3) + 4
Answers
Answer:
Subtract
9
from
12
.
6
x
+
3
+
4
Add
3
and
4
.
6
x
+
7
Step-by-step explanation:
for a walkathon a sponsor committed to give you a flat fee $5 plus $2 for every mile m you walk.
A.write an expression for the total amount you will collect from your sponsor at the end of the walkathon
B. then evaluate your expression for 20 miles walked
Answers
Need help on this please Help. I would really appreciate it :)
Answers
Answer:
i am not sure but according to me ans is d
Step-by-step explanation:
Ax+By=C
Ax=C-By
A=C-By/x
Yesenia swims laps at a pool. For every 10 laps she swims the backstroke, she swims 15 laps of freestyle. Which ratio shows the number of laps Yesenia swims the backstroke to the number of laps she swims freestyle?
Answers
Answer:
2:3
Step-by-step explanation:
Answer:
2-3
Step-by-step explanation:
The sum of two consecutive even integers is 70. Find the integers
Answers
Answer:
It is 34 and 36.
Step-by-step explanation:
pls help me with this
Answers
Answer:
I would say 3
Step-by-step explanation:
Most reasonable
You want to fit all of your lip glosses in _3
makeup bags. You already have 3 makeup bags.
They are different sizes. The sizes are S,L,L.
Small-(8.5" H x 8.75 in "W). Large-6.75 in Hx
9.25 in W x 3.25 in D. You have 35 lip glosses.
They are all _6_inches.How many more makeup
bags do you need to buy?/ if any.
Answers
Answer:
uwiouwj22nnjj n2k2k2km n2n2j2j2j2jn2n2 2 2 2 2n2j2j2n2n2 2 2 3 3n2j2j2n3n n3j3n3n3n3 3
Breannas cat weighs 3200 grams. Her neighbors cat weighs 4.68 kilograms. What is the difference, in grams, of the weights of two cats
Answers
Answer:
1480 grams.
Step-by-step explanation:
3200 grams = 3200/1000
= 3.2 kgs.
Difference in weight = 4.68 - 3.20
= 1.48 kgs
= 1480 grams.
Answer:
3,200g - 4.68kg = 1480
Step-by-step explanation:
4.68k g = 4,680 g
1 kg = 1,000 g
4,680 - 3,200 = 1480
Find S, for the series below.
-3,-1, 1, 3, 5, ...
S6 =
Answers
s6 = 7
Step-by-step explanation:
you have to see what kind of pattern is going on in this case it's +2 -3 to -1 is +2, -1 to 1 is +2 and so on so apply that rule to 5 and you'll get the answer 5 + 2 is 7 and that's why it's 6th term in S!!I hope this helped
Function Homework f(x) g(x)
Answers
Answer:
5x-1
Step-by-step explanation:
In parallelogram JKLM, what is the relationship between angle j and angle k?
j° + k° = 180°
j° = k°
j° = -k°
j° - k° = 180°
1 of 4
Answers
Answer:
since j&k are interior angles if I added they should come up to 180° so j + k is equals to 180° yeah that's the answer
what's the value for x makes this equation true 3/5 X-0.5=19
Answers
Answer:
what's the value for x makes this equation true 3/5 X-0.5=19 HERE YOU GO!!
Step-by-step explanation:
-5x - (-7 - 4x) = -2(3x - 4)
-5x + 7+ 4x = -6x + 8
-x + 7= -6x + 8
5x = 8 - 7
5x = 1
x = 1/5
An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
The value of x that makes the equation 3/5x - 0.5 = 19 true is 32.5.
What is an equation?An equation is a mathematical statement that is made up of two expressions connected by an equal sign.
Example:
2x = 4 is an equation.
3x = 6 + 5 is an equation.
We have,
3/5x - 0.5 = 19
Add 0.5 on both sides.
3/5x = 19 + 0.5
3/5x = 19.5
Multiply 5/3 on both sides.
x = 19.5 x 5/3
x = 32.5
Thus,
The value of x that makes the equation 3/5x - 0.5 = 19 true is 32.5.
Learn more about equations here:
https://brainly.com/question/17194269
#SPJ5
A number m plus 4 is greater than or equal to 7.
Answers
Answer:
m is greater than or equal to 3
Step-by-step explanation:
[tex]m \geqslant 3[/tex]
Answer:
[tex]m + 4 \geqslant 7 \\ m \geqslant 7 - 4 \\ m \geqslant 3[/tex]
what is 96 divided by 4
Answers
Answer:
24
Step-by-step explanation:
Evaluate the expression when a= 1/4 and b=6
Answers
Answer:
b=24
Step-by-step explanation:
Figure 3
62°
144 what is the angle measure in degrees for thr missing variable x in figure
Answers
The value of the angle x is equal to 98°.
Given that the figure attached below.
To find the angle x, follows sum steps as:
Draw one parallel line between the given parallel lines with intersect the point x.
By linear sum,
Angle 1 on below parallel line is 180° - 144° = 36°.
Angle 2 is equal to angle 1, that is, angle 2 is equal to 36°.
Angle 3 on centre parallel line is equal to 62°.
So, the angle x is calculated as:
x = Angel 2 + Angle 3
x = 36° + 62°
x = 98°
Hence, the required angle is equal to 98°.
Learn more about Angle here:
brainly.com/question/30147425
#SPJ6
Can someone help me please ?
Answers
Answer:
C I am pretty sure.
Step-by-step explanation:
For C, we can alter the equation to be 5 - 9 > 2x or -2 > x which satisfies the graph above. Similarly, we can alter the second equation to be 3x ≥ -3 or x ≥ -1 which again is true from the graph above.
Help, I’m stuck. Lol.
Answers
Answer:
a. height = 12
b. area = 228
Step-by-step explanation:
a. To find the height, we can use the triangle formed by the side that measures 15, the side that measures 9. and the height. The hypotenuse of the triangle(the longest side opposite of the right angle), is 15. We can then use the Pythagorean Theorem, which states that [tex]a^2+b^2=c^2[/tex], where c is the hypotenuse, and a and b are the two other sides. In this case, we need to find a leg of the triangle, not the hypotenuse. What do we do? We can first call the height a, and rearrange the Theorem into [tex]c^2-b^2=a^2[/tex]. [tex]15^2=225, 9^2=81,[/tex] and [tex]225-81=\sqrt{144}[/tex]=12. Therefore, the height of the parallelogram is [tex]\boxed{12}[/tex]
b. To find the area of the parallelogram, we can use the area formula, which is Base*Height. The base is the flat side. We can find the base by adding 9+10=19, and [tex]19\cdot12=\boxed{228}[/tex]
if x does not equal 16 then 2x+10 does not equal 42
Answers
Answer:
The answer is
True
Write the question the symbols represent, then solve it.
f(-2)=-3+2x^2
Answers
Answer:
f(-2) = 5
Step-by-step explanation:
Step 1: Define
f(x) = -3 + 2x²
f(-2) is x = -2
Step 2: Substitute and Evaluate
f(-2) = -3 + 2(-2)²
f(-2) = -3 + 2(4)
f(-2) = -3 + 8
f(-2) = 5
simplify: log64+2log5-2log40
Answers
Answer: 0
Step-by-step explanation:
Use rules of logarithms to condense.
The midpoint of PQ is M(, –1). One endpoint is Q(3, –5). Which equations can be solved to determine the coordinates of P? Check all that apply.
Answers
Answer:
c and d. just did the lesson and its those two.
Step-by-step explanation:
Answer:
the person above me is right
Step-by-step explanation:
Round 3.55 to the nearest whole number
Answers
Answer:
i think the answer is 4
2) Domain
Range
Function?
Answers
Answer:
domain range edge trangleIt is a function
Continuous
Range im not sure
which proof has a flaw? ( i need help in my geometry class, and will give brainliest answer if is correct!!) please help :)
Answers
Answer:
The second reason is incorrect.
It should be "Transitive Property of Congruence"
Answer:
Reason 2 ( got it correct on my test)
Step-by-step explanation:
The reason must justify its corresponding statement.
Which statement best explains the value of 16 − (−3)?
The additive inverse of −3 is −3, so 16 − (−3) = 19.
The additive inverse of −3 is −3, so 16 − (−3) = 13.
The additive inverse of −3 is +3, so 16 − (−3) = 19.
The additive inverse of −3 is +3, so 16 − (−3) = 13.
Answers
Answer:
The additive inverse of −3 is +3, so 16 − (−3) = 19
negative 6 over 8 minus negative 1 over 8 = negative 5 over 8; therefore, the distance from A to B is absolute value of negative 5 over 8 equals negative 5 over 8 units
Because it is 3 units to the left of 2 on a horizontal number line
Step-by-step explanation:
The answers are the explanation.
Comment on the second question
Note that the second question asks for the distance from -6/8 to -1/8. Ordinarily, the distance from A to B would be computed as B - A. In this set of answer choices, it is computed as |A - B|. In the end, the result is the same.
Personally, I would compute the distance between points on a number line by subtracting the left point from the right point. Here, that would also correspond to B - A.
Comment on choosing 'word' answers
In a set of answers like these, one way to choose answers is simply to eliminate the ones that make a false statement. Often, you are left with only the correct answer choice.
For example, the statement "the additive inverse of -3 is -3" is a false statement, so the first two answer choices can be eliminated. Likewise, the statement 16 -(-3) = 13 is false, so that choice can be eliminated. The one remaining answer is the correct one.
have a good day hope this helped!
How many solutions to y=2x-3 y=-x+3
Answers
Answer:
One solution, as there is only one intersection between these two lines.
x = 2, and y = 1 (point of interesection (2, 1) )
y = 2x-3
y = -x + 3
first step is to substitute the y of one equation into the other and solve for x.
- x + 3 = 2x - 3
___________
+x. +x
_____________
3 = 3x-3
_____________
+3 +3
____________
6 = 3x
_____________
÷3 ÷3
_______________
2 = x
______________
x = 2
_______________
We can verify this value is true by substituting it back into the equations and as a result also solving for the working y value.
x = 2 -> y = 2(x) - 3
2(2) - 3 = 4 - 3 = 1
y = 1
____________
x = 2 -> y = -(x) + 3
-(2) + 3 = -2 + 3 = 1
y = 1
Solve the equation shown:
-5(x - 3) +7x = 35
x =
Answers
Answer:
10
Step-by-step explanation:
[tex]-5(x-3)+7x=35[/tex]
Distribute the 5
[tex]-5x+15+7x=35[/tex]
Combine like terms
[tex]2x+15=35[/tex]
Subtract 15 to isolate the variable
[tex]2x=20[/tex]
Divide by 2
[tex]x=10[/tex]
Answer:
x = 10
Step-by-step explanation:
Simplify by applying the distributed property: -5x - -15 + 7x = 35Simplify: -5x + 15 + 7x = 35Combine like terms: 2x + 15 = 35Subtract 15 from each side, so it now looks like this: 2x = 20Divide each side by 2 to cancel out the 2 next to x. It should now look like this: x = 10I hope this helps!
a) Sheetal has eight Rs 5. coins. After purchasing 1 kg of tomatoes, only one coin left with her. What is the price
of 1 kg of tomatoes? b)The shopkeeper has 46 kg 750 g of tomatoes in his stock. He sells 28 kg 850 g of
tomatoes. What is the weight of tomatoes that are left?
Answers
Step-by-step explanation:
please check the attached picture..and rotate it
In this fraction, which number is the denominator?
8
16
O A. 16
OB. 8