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Chapter 9: Q 29. (page 566)

Experiments on learning in animals sometimes measure how long it takes mice to find their way through a maze. The mean time is 18 seconds for one particular maze. A researcher thinks that a loud noise will cause the mice to complete the maze faster. She measures how long each of 10 mice takes with a loud noise as stimulus. The appropriate hypotheses for the significance test are

a. H0:渭=18;Ha:渭鈮�18

b. H0:渭=18;Ha:渭>18

c. H0:渭<18;Ha:渭=18

d. H0:渭=18;Ha:渭<18

e. H0:x炉=18;Ha:x炉<18

Short Answer

Expert verified

Option (d) is correct.

Step by step solution

01

Given Information

It is give that mean time for maze is 18seconds.

02

Explanation

We will conduct hypothesis for population parameter (not sample statistics).

The null and alternate hypothesis are as below:

H0:渭=18

Ha:渭<18

For completion of maze faster, time need to be decreased. therefore test is left tailed.

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Most popular questions from this chapter

A government report says that the average amount of money spent per U.S. household per week on food is about \(158. A random sample of50 households in a small city is selected, and their weekly spending on food is recorded. The sample data have a mean of \)165 and a standard deviation of \(20. Is there convincing evidence that the mean weekly spending on food in this city differs from the national figure of \)158?

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