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Chapter 9: Q.67 (page 588)

In the study of older students鈥� attitudes from Exercise 63, the sample mean SSHA score was 125.7 and the sample standard deviation was 29.8.

(a) Calculate the test statistic.

(b) Find the P-value using Table B. Then obtain a more precise P-value from your calculator.

Short Answer

Expert verified

a. the test statistic is2.409

b. The P-value using Table B is0.0101

Step by step solution

01

Introduction

A test statistic is a statistic utilized in statistical hypothesis testing. A hypothesis test is typically specified as far as a test statistic, considered as a numerical synopsis of an informational collection that decreases the information to one worth that can be utilized to play out the hypothesis test.

02

Explanation Part (a)

The sample size is n = 45

standard deviation s = 29.8

sample mean x-=125.7

Using,

role="math" localid="1652954730678" t=x-鈭�渭sn

=125.7鈭�11529.845=2.409

03

Explanation Part (b)

calculating the degree of freedom,

n-1=45-1=44

The p-value is found using,

=Ptc>|0.77|=0.0101

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