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Eddi Din [679]
3 years ago
5

A teacher claims that there is a 50% chance that she

Mathematics
1 answer:
mash [69]3 years ago
3 0

Answer:

D

Step-by-step explanation:

That's the answer on edge!

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quinten is making bread and wants to triple the recipe the recipe calls for 2 third cup off sugar how much sugar will he need
yKpoI14uk [10]
Quinten will need 2 cups of sugar
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3 years ago
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A researcher records the amount of time (in minutes) that parent child pairs spend on social networking sites to test whether th
ki77a [65]

Answer:

(a) A matched pair design is used to perform the test.

(b) Each sample is of size 30.

(c) The null hypothesis is rejected.

(d) The effect size of the test is medium.

Step-by-step explanation:

A statistical experiment is performed to determine whether the amount of time (in minutes) that parent-child pairs spend on social networking sites to test show any generational differences.

<u>Given</u>:

MD = -42 minutes

t₍₂₉₎ = 4.021

p < 0.05

d = 0.49

The hypothesis is:

<em>H₀</em>: There is no difference between the means, i.e. <em>μ₁</em> = <em>μ₂</em>.

<em>Hₐ</em>: There is a significant difference between the means, i.e. <em>μ₁</em> ≠ <em>μ₂</em>.

(a)

A matched pair design is used to perform the test.

In a matched pair design the participant of the two groups are related in some way. For example, the same sample is tested before and after applying the treatment.

In this case the matched are pairs are of children and their parents. And the treatment is the amount of time spent on social networking sites.

(b)

The degrees of freedom of a matched pair design is:

df = n - 1

29 = n - 1

n = 29 + 1

n = 30

Thus, each sample is of size 30.

(c)

The <em>p</em>-value of the test statistic is < 0.05.

If the <em>p</em>-value is less than the significance level <em>α </em>(say, 0.05) then the null hypothesis is rejected and vise-versa.

Since <em>p</em> < 0.05 the null hypothesis is rejected concluding that there is a significant difference between the amount of time spent on social networking sites by parents and children.

(d)

The estimated value of Cohen's d is, <em>d</em> = 0.49.

A Cohen's d value between the range 0.50 to 0.80 is considered as medium.

Thus, the effect size of the test is medium.

3 0
3 years ago
the slope of the line is below 2. use the coordinates of the labeled point to find a point-slope equation of the line.
Allushta [10]

Answer:

C

Step-by-step explanation:

The equation of a line in point- slope form is

y - b = m(x - a)

where m is the slope and (a, b) a point on the line

Here m = 2 and (a, b) = (1, 9) , thus

y - 9 = 2(x - 1) → C

3 0
3 years ago
What is the solution to this equation?
zepelin [54]

Answer:

A -3

Step-by-step explanation:

-6 times -3 = Postive 18. then 18+3=21

:). Hope that helped

8 0
2 years ago
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Aarva cleans 6 apartments in 2.5 hours. how long will it take him to clean 30 apartments
Anon25 [30]
6 apartments in 2.5 hours
30 apartments in ? Hours

6/2.5=30/x
6x=(30)(2.5)
x=75/6
x=12.5 hours
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