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3 years ago

Can y’all help me on question 17?!

Mathematics

2 answers:

melisa1 [442]3 years ago

7 0

Answer:

For 17 it's 5: 7.5 i hope it helps?

Step-by-step explanation:

Blizzard [7]3 years ago

3 0

He will need 7.5 cups of sugar.
You start by searching for how much sugar goes with each stick of butter. You divide 3 by 2 wich gives you 1.5, each stick of butter goes with 1.5 cups of sugar. You multiply each stick of butter needed (5) with each cup of sugar needed (1.5) giving you your answer (7.5 cups)

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Answer:

The value of the test statistic is z = -0.877.

Step-by-step explanation:

Testing the difference in mean time spent on housework between husbands and wives.

At the null hypothesis, we test if there is no difference, that is, the subtraction of the means is 0:

$H_0: \mu_H - \mu_W = 0$

At the alternate hypothesis, we test if there is a difference, that is, the subtraction of the means is different from 0.

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0 is tested at the null hypothesis:

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For the wives the mean was 7 hours/week and for the husbands the mean was 4.5 hours/week. The standard deviation of the differences in time spent on house work was 2.85.

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What is the value of the test statistic for testing the difference in mean time spent on housework between husbands and wives?

$z = \frac{X - \mu}{s}$

$z = \frac{-2.5 - 0}{2.85}$

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The value of the test statistic is z = -0.877.

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