Question

Resting pulse rate is an important measure of the fitness of a person's cardiovascular system with a lower rate indicative of greater fitness. The mean pulse rate for all adult males is approximately 72 beats per minute. A random sample of 15 male students was selected and the mean resting pulse rate was found to be 80 beats per minute with a standard deviation of 20 beats per minute. The experimenter wishes to test if the students are less fit, on average, than the general population. Which of the following is accurate?

Select one:

a. This sample is too small to use for statistical inference.

b. Statistical inference about the population mean would require the normal distribution.

c. Statistical inference about the population mean would require the t-distribution.

d. Either the normal or t-distribution could be used.

Answer 1