Answer:
d. t-test for means
Step-by-step explanation:
Options are "a. z-test for proportions, b. z-test for means, c. none of the other three answers, d. t-test for means"
Sample size = n = 120
Sample mean = x = 0.8
Sample standard deviation = s = 2
Claim: A particular diet helps loss weight.
Hypothesis test
The null and alternative hypothesis is
H0 : μ = 0
Ha : μ < 0
Now, when population standard deviation is unknown we use t-test otherwise use z-test. So, the kind of hypothesis testing that we use is t-test for means.
Find the length of the line segment formed by the points (2, 3) and (2, 5)
Answer:
2 units
Step-by-step explanation:
Given data
The points are (2, 3) and (2, 5)
x1= 2
y1= 3
x2= 2
y2= 5
substitute into the distance between two points formula
d=√((x_2-x_1)²+(y_2-y_1)²)
d=√((2-2)²+(5-3)²)
d=√(2)²)
d=√4
d= 2 units
Hence the length is 2 units
16. Using a standard 52 card deck, what is the probability of pulling the king of hearts if you are
given two attempts (you will pull out one card and then another card)?
Answer:
Step-by-step explanation:
The way to do this (I think) is to figure out the probability of not getting said king on either throw.
First Throw: P(no King Hearts) = 51/52
Second Throw: P(no King Hearts) = 50/51
Total probability = 51/52*50/51 = 50/52
Therefore the probability of getting it right is
P(KH) = 1 - 50/52 = 2/52 = 1/26
I have a feeling that this is not correct. If you get a different answer that looks reasonable, take it.
The piecewise function h(x) is shown on the graph.
What is the value of h(3)?
Answer:
In the given graph h(x)
When x=3, h(3)=1
1 is the right answer.
Find the solution of the system of equations.
-9x + 2y = -19
5x + 4y = –15
Answer:
x=1 and y=-5
Step-by-step explanation:
i think that is right
Lily spent $190 on shirts. Fancy shirts cost $20 and plain shirts cost $10. If she bought a total of 12 then how many of each kind did she buy?
Answer:
7 fancy shirts and 5 plain shirts
Step-by-step explanation:
f and p are the numbers of fancy and plain shirts
f+p = 12
p = 12-f
20f + 10p = 190
20f + 10(12-f) = 190
20f + 120 - 10f = 190
10f = 70
f = 7
p = 12-f = 5
Determine the x- and y-intercepts of the graph of x−4y=8.
Then plot the intercepts to graph the equation.
Answer:
y-intercept = -2
x-intercept = 8
Step-by-step explanation:
[tex]x - 4y = 8\\x = 0 => y = -2\\y=0 => x = 8[/tex]
can anyone help me please ?
Answer: 84 dollars
Step-by-step explanation:
help asap i will give brainliest
Answer: 6
Step-by-step explanation:
Answer:
6
Step-by-step explanation:
About 5% of the surface area of the U.S. is water. What decimal represents the amount of the U.S. surface area taken up by water?
This is the last question on my homework whoever answers gets brainliest :)
Answer:
.05
Step-by-step explanation: .5 would be 50%
If a car travels at an average speed of 68 miles an hour, how many miles will the car
travel in 3 hours and 30 minutes?
Answer:
I did the math and I think its 238 if I'm wrong I'm sorry
Question 12
The average mass of Jeremy, Mark and Zack is 28 kg. If Jeremy and Zack's average mass is
29kg. How heavy is Mark?
Answer:
Mark's mass is 26 kg.
Step-by-step explanation:
Average mass of Jeremy, Mark and Zack = 28kg
Average mass of Jeremy and Zack = 29 kg
Let,
Jeremy's mass = x
Mark's mass = y
Zack's mass = z
Average of three of them = [tex]\frac{Jeremy's mass + Mark's + Zack's}{3}[/tex]
28 = [tex]\frac{x+y+z}{3}\\[/tex]
[tex]28*3 = x+y+z\\84 = x+y+z[/tex]
x+y+z = 84 Eqn 1
[tex]29 =\frac{x+z}{2}\\58=x+z\\[/tex]
x+z = 58 Eqn 2
Now putting value of x+z from Eqn 2 in Eqn 1
x + z + y = 84
58 + y = 84
y = 84 - 58
y = 26
Thereofore,
Mark's mass is 26 kg.
what fraction is greater than 3/4
Answer:
any positive whole number more than 0
or one example is 5/4
In one particular suburb, there are 5 families that own a boxer. If there are a total of
25 families that own a dog in general, then what percentage of dog owners have a boxer?
Round your answer to the nearest whole number if necessary.
Answer:
60%
Step-by-step explanation:
Explanation:
To get percentages, take the part of a population that is being specified and divided that by the whole population and multiply that value by
100
%
.
So there are
30
people that own boxers, this is the specific population that is being compared to the whole dog-owning population, which is comprised of
50
total families. So
30
50
can be reduced to
3
5
and that gives us
.6
When that value is multiplied by
100
%
, it gives us our percentage of
.6
⋅
100
%
=
60
Write a multiplication equation and a division equation that represent this situation. Use “?” to represent the unknown quantity.
Answer:
csdkc kwhbfc d cjasd c
Step-by-step explanation:
sdjnf ewaihfbashehkf liq4bf;wjhf
2 Find the area of the
shaded region.
5in
3in
8in
15in
A 51 square inches
B 75 square inches
C 9 square inches
D 31 square inches
Answer:
A.51
Step-by-step explanation:
What’s a cows favorite type of math?
Answer:
mooltiplication
The solution is, Multiplication is a cows favorite type of math.
What exactly is the Purple Cow Poem about?Gelett Burgess, author of The Purple Cow (1866–1951), I've never seen a Purple Cow and I've never hoped to; nevertheless, I can tell you that I'd much prefer see than be one. Death is a definite fact and a guarantee of life. Despite his unflinching devotion, Andrew Hudgins admits that the cow will inevitably die when it becomes feeble since he will slaughter it in stanza three. When she becomes too weak to provide us with fresh cream, we will cut her scarlet throat. Gelett Burgess, an American author, wrote a brief nonsensical poem titled "Purple Cow." In 1895, it was first printed.
here, we have,
In an experimental setup the independent variable is the one which can be changed and manipulated in an experiment the effect of which is observed on the dependent variable (s). The dependent variable is the one which cannot be manipulated in an experiment instead the changes occurring in a dependent variable are because of the manipulation of the independent variable. The dependent variable represents the outcome of the experiment.
According to the given situation, type of feed is the independent variable this is because of the fact that the there were two type of feeds were used one was experimented feed other was regular feed. The effect of both type of feeds has been observed on the weight of the cow which is the dependent variable.
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Find each difference.
• (-5) – 6 =
.
35 – (-8) =
.
43 - (-1) =
Answer:
1=1
2=43
3=44
Step-by-step explanation:
the subtraction negative and the negative in the parentheses make a positive so instead of subtracting them you add them together
Subtract 9/10-2/5 what is the answer?
Answer:
[tex]★\:\: \frac{9}{10} -\frac{2}{5}\\ = \frac{9}{10}- \frac{4}{10} \\ = \frac{(9 - 4)}{10} \\ = \frac{5}{10} \\ = \boxed{ \frac{1}{2}}✓ [/tex]
1/2 is the right answer.Jerry is buying hot dogs and hamburgers for his barbeque. Hot dogs cost $9 per pack, while hamburgers cost $6 per pack with taxes
included. Jerry can spend a maximum of $100 on the food.
Using x and y for the number of packs of hot dogs and hamburgers, respectively, what is an inequality that represents this situation?
Answer: 9x+6y ≤10
Step-by-step explanation:
Let x= number of packs of hot dogs .
y =number of packs of hamburger.
Total expenditure = (Charge per hot dog) (number of packs of hot dogs ) +(Charge per hamburger) (number of packs of hamburger.)
i.e. Total expenditure =9x+6y ( in $)
Jerry can spend a maximum of $100 on the food.
So, Total expenditure ≤ $100
i.e. 9x+6y ≤10 [Required inequality]
The inequality that represents this situation:9x+6y ≤10
Drag each expression to show whether it is equivalent to 6(4x−1), 24x+6, or (4⋅6x)+(4⋅2) somebody please help me i need to get this right
1.We have to find equivalent expression of ⇒ 54 x+18
These are the equivalent expression of
=3×3×3×2× x+3×3×2
=3×3×2×(3 x+1)
=18×(3 x+1)
2.⇒Equivalent expression of→ 18×(3 x-1)
=18× 3 x -18------[Using commutative property of Multiplication with respect to subtraction)
=54 x-18
3.⇒Equivalent expression of→6×9 x+ 6×1
=54 x +6
⇒Option B
6×9 x +6×3-------equivalent expression of →54 x+18
⇒Option C
54 x+6-------equivalent expression of →6×9 x+ 6×1
⇒Option D
3×(18 x+2)------equivalent expression of →6×9 x+ 6×1
⇒Option F
9×6 x -9×2-------equivalent expression of → 18×(3 x-1)
(credit to: not me-)
Answer:
wrong question i'm sorry, but I can't delete this lol so here's my question :(
Drag each expression to show whether the expression is equivalent to 12x−6, 24x+12, or neither.
(4 + x)(x - 5)
Is the expression linear or quadratic?
Answer:
it's quadratic
Step-by-step explanation:
(4x+x)(x-5)
after expanding will give the answer x²-5x+4x-20 which is also equal to x²-x-20
Please help thank you! (read the screenshot)
Answer:
Step-by-step explanation:
Answer:
i dont know this one sorry wish i could help
Step-by-step explanation:
The radius of star A is 6.9203x10^5 km, which is 108.7 times the rafius of star B. what is the radius of the star B?
Answer:
6366.4213
Step-by-step explanation: 6.9203x10^5 is 692,030. I divided 692,030 by 108.7 to get the answer. Anybody can correct any error I may have.
Francis ran 2 1/5 miles in 7/12 of an hour. How many miles can Francis run in one hour?
Answer:
3 7/10 miles
Step-by-step explanation:
divide miles by hours
11/5 ÷ 7/12 = 11/5 · 12/7 = 132/35 or 3.7 mph
2
A sum of money is shared in the ratio 2:3
If the larger share is £27, how much money is there altogether?
Answer:
45 euros
Step-by-step explanation:
When the whole ratio is equals to 5 and 3 parts are 27 euros first we should find of one part which 27 divide by 3 equals to 9 then 9 times 5 equals to 45 euros the answer is 45 euros
What is the value of the x?
Answer:
53
Step-by-step explanation:
37+90=127
180-127=53
Which expression has a solution of 5, if r = 3?
Answer:
i need a picture
Step-by-step explanation:
help please (place and label the following numbers on the number line. Order them as best as you can.)
-1
1.75
-1.75
-2
-2.5
-5/2
9/4
Answer:
least to greatest in order: -5/2(-2.5), -2.5, -2, -1.75, -1, 1.75, 9/4(2.25)
The numbers -1, 1.75, -1.75, -2, -2.5, -2.5, and 2.25 represented on the number line are given below.
What is a number line?A number line refers to a straight line in mathematics that has numbers arranged at regular intervals or portions along its width. A number line is often shown horizontally and can be postponed in any direction.
The following numbers on the number line are given below.
-1, 1.75, -1.75, -2, -2.5, -5/2, 9/4
Convert the fraction number into a decimal number. Then we have
-1, 1.75, -1.75, -2, -2.5, -5/2, 9/4
-1, 1.75, -1.75, -2, -2.5, -2.5, 2.25
The numbers -1, 1.75, -1.75, -2, -2.5, -2.5, and 2.25 represented on the number line are given below.
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Promise Easy Points
Calculate the average monthly expenses for these individuals?
Kelsey spent $350 in May, $432 in June and $420 in July. Her average monthly expenses are:____
Michael spent $700 in April and May and $800 in June and July. His average monthly expenses are:____
$420+$350+$432=kelsey's monthly expenses
$700+$800=Micheal's Monthly expenses
Michael's average monthly expenses are $750.
What is the average?The average value in a set of numbers is the middle value, calculated by dividing the total of all the values by the number of values. When we need to find the average of a set of data, we add up all the values and then divide this total by the number of values.
Given that, Kelsey spent $350 in May, $432 in June and $420 in July.
Now, average monthly expenses are
(350+432+420)/3
= 1202/3
= 400.67
Michael spent $700 in April and May and $800 in June and July.
Here, (700×2+800×2)/4
= (1400+1600)/4
= 3000/4
= $750
Therefore, Michael's average monthly expenses are $750.
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Suppose you roll a special 24-sided die. What is the probability that the number is a 1 or a 2
On the roll a special "24-sided" die, the probability that the number is a "1" or a "2" is 1/12.
The probability of rolling a "1" or "2" on a 24-sided die is the sum of the probabilities of rolling a 1 and rolling a 2, because the events are mutually exclusive.
Since each face of the 24 sided-die is equally likely to come up, the probability of rolling any particular-face is 1/24.
So, the probability of rolling a "1" is 1/24, and the probability of rolling a "2" is also 1/24.
The probability of rolling either a 1 or a 2 is the sum of these probabilities:
⇒ P(rolling a 1 or a 2) = P(rolling a 1) + P(rolling a 2),
⇒ 1/24 + 1/24,
⇒ 2/24,
⇒ 1/12.
Therefore, the required probability is 1/12.
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