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Chapter 10: Q. 3 (page 596)

A new windshield treatment claims to repel water more effectively. Ten windshields are tested by simulating rain without

the new treatment. The same windshields are then treated, and the experiment is run again. A hypothesis test is conducted.

Indicate if the hypothesis test is for

a. independent group means, population standard deviations, and/or variances known

b. independent group means, population standard deviations, and/or variances unknown

c. matched or paired samples

d. single mean

e. two proportions

f. single proportion

Short Answer

Expert verified

The test is for matching or paired samples.

Step by step solution

01

Given information

A new windshield treatment claims to repel water more effectively. Ten windshields are tested by simulating rain without

the new treatment. The same windshields are then treated, and the experiment is run again. A hypothesis test is conducted.

02

Calculation

Rain is simulated and 10 windshields are tested without the new treatment. Then the windshields are treated with the new treatment which claims to repel water better. Now the treated windshields are again tested with the same experiments.

Assuming mean of with and without new treatment sample difference is 渭.

The null and alternative hypothesis is given as :

H0:渭=0Ha:渭鈮�0

This shows that this hypothesis testis for matching or paired test.

03

Final answer

The test is for matching or paired samples.

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Most popular questions from this chapter

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Use the following information to answer the next 15 exercises: Indicate if the hypothesis test is for

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Use the following information to answer the next 15 exercises: Indicate if the hypothesis test is for

a. independent group means, population standard deviations, and/or variances known

b. independent group means, population standard deviations, and/or variances unknown

c. matched or paired samples

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e. two proportions

f. single proportion

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