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zalisa [80]
2 years ago
9

Lin is selling boxes of cookies. Each box costs $3.75. Lin's goal is to earn more than $30 selling cookies. If Lin sells 20 boxe

s of cookies, will she make her goal? How much will she earn?
Mathematics
1 answer:
FromTheMoon [43]2 years ago
3 0

Answer:

With 20 boxes, she <u>WILL</u> make her goal. She will earn $75

Step-by-step explanation:

x = per box

Equation:

3.75x > 30

3.75(20) > 30

75 > 30

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d = \frac{78.24 -66.25}{\sqrt{\frac{7^2 +7^2}{2}}}= 1.713

For the interpretation we consider a value for d small is is between 0-0.2, medium if is between 0.2-0.8 and large if is higher than 0.8.

And on this case 1.713>0.8 so we have a large effect size

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Step-by-step explanation:

Previous concepts

The Effect size is a "quantitative measure of the magnitude of the experimenter effect. "

The Cohen's d effect size is given by  the following formula:

d = \frac{\bar X_1 -\bar X_2}{\sqrt{\frac{s^2_1 +s^2_2}{2}}}

Solution to the problem

And for this case we can assume:

\bar X_1 =78.24 the mean for females

\bar X_2 =66.25 the mean for males

s_1 = s_2= 7 represent the deviations for both groups

And if we replace we got:

d = \frac{78.24 -66.25}{\sqrt{\frac{7^2 +7^2}{2}}}= 1.713

For the interpretation we consider a value for d small is is between 0-0.2, medium if is between 0.2-0.8 and large if is higher than 0.8.

And on this case 1.713>0.8 so we have a large effect size

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4 0
3 years ago
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