A simple random sample of 40 men results in a standard deviation of 10.3 beats per minute. The normal range of pulse rates of adults is typically given as 60-100 bpm. If the range rule of thumb is applies to that normal range, the result is a standard deviation of 10 bpm. Use the sample results with a 0.05 significance level to test the claim that pulse rates of men have a standard deviation equal to 10 beats per minute. (Statistics)