Question

Claim: The standard deviation of pulse rates of adult males is less than 12 bpm. For a random sample of

126 adult​ males, the pulse rates have a standard deviation of 11.4 bpm. Find the value of the test statistic.

The value of the test statistic is  

Answer 1

Solution:

This is a left tailed test,

$\chi ^{2}$ = ( ( n - 1 ) )/ $\sigma ^{2}$

= ( 125 * ( 11.4 )² ) / 12²

= 108.89

The value of the test statistic is  108.89