Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 147 adult males, the mean pulse rate is 69.5 bpm and the standard deviation is 11.2 bpm. Find the value of the test statistic.

The statistic is given by:

(1)  

And replacing we got:

Step-by-step explanation:

Information given

represent the sample mean    

represent the sample standard deviation

sample size  

represent the value that we want to test

t would represent the statistic (variable of interest)  

Hypothesis to test

We want to check if the true mean is 69, the system of hypothesis would be:  

Null hypothesis:  

Alternative hypothesis:  

The statistic is given by:

(1)  

And replacing we got:

30 people weigh 160 pounds or more