Question

This problem is an example of getting a test statistic without Excel.

Testing to see if:

Ha:μ>31.915

Your sample consists of 42 subjects, with a mean of 32.2 and standard deviation of 2.97.

To get your test statistics by hand, you have to calculate the t-score, using the formula on the z and t sheet
First, calculate ¯x−μ  

Now multiply this by the √n  

Now divide this by s to get  

Answer 1

this is the right tailed test .  

The null and alternative hypothesis is ,

H0 :   = 31.912

Ha : > 31.912

Test statistic = t

= ( - ) / s / n

= (32.2-31.912) / 2.97 / 42

=0.63