Answer: 
Explanation:
Given : The mean pulse rate (in beats per minute) of adult males
For sample : Size = 
Mean : 
Standard deviation : 
We assume that its a normal distribution , since the sample size is large (>30) then test applied here is z-test .
The formula to calculate the z-statistic is given by :-


Hence, the value of the test statistic = 
I would say A & B (not sure about C because it isn’t that dangerous?)
To show the type of activities completed by skeletal muscles
To identify how much energy is used at low resting levels
To describe the amount of movement required for maximal exertion
To highlight that a physical activity requires a body to use energy