In Exercises 9–12, refer to the exercise identified. Make subjective estimates to decide whether results are significantly low or significantly high, then state a conclusion about the original claim. For example, if the claim is that a coin favours heads and sample results consist of 11 heads in 20 flips, conclude that there is not sufficient evidence to support the claim that the coin favours heads (because it is easy to get 11 heads in 20 flips by chance with a fair coin).
Exercise 8 “Pulse Rates”

Question

Accepted Answer

The result of 11.3 bpm is neither significantly low nor significantly high.

There is enough evidence to reject the claim that the standard deviation of pulse rates of adult males is more than 11 bpm.

Short Answer