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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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state appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest
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