Question

Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69bpm. For a random sample of 156 adult​ males, the mean pulse rate is 68.4 bpm and the standard deviation is 10.8 bpm. Find the value of the test statistic.

The value of the test statistic is = ??

​(Round to two decimal places as​ needed.)

Answer 1

this is the two tailed test .  

The null and alternative hypothesis is ,

H0 :   = 69

Ha :     69

Test statistic = z

= ( - ) / / n

= (68.4-69) / 10.8/ 1156

= -0.69