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Chapter 10: Q.10.134 (page 443)

Cooling Down. Refer to Exercise 10.128 and find a 98% confidence interval for the difference between the mean times to fatigue on a treadmill in a hot and humid environment after cooling down with cold water and after cooling down with an ice slurry.

Short Answer

Expert verified

The data has a 98% confidence interval of (-7.33,-4.47).

Step by step solution

01

Given Information

The given data is,

SubjectCold waterIce slurry1525623743344524515853438638457414585058103844

02

Explanation

The null and alternative hypotheses are,

H0:渭d=0

Ha:渭d<0

The output of MINITAB is presented below.

-11.70,0are the test statistics and pvalues.

03

Explanation

Level of significance has a critical value of 2.821.

The confidence level is,

CI=d炉卤ta2sdn

=-5.9卤(2.821)1.610

=(-7.33,-4.47)

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Most popular questions from this chapter

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