Question

8. (8 pts). Pulse Rates: Puhe rate is an impontant measure of fitness of a persons cardiovascular system. The mean pulse rate for all U.S adult males is approximately 72 heart beats per minute random sample of 21 U.S. adult males who jog at least 15 miles per week had a mean puse rane of 52.6 beats per minutes and a standard deviation of 3.22 beats per minutes a) Find the 95% confidence interval for the mean pulse rate of all usada maledKathat is miles per week. Do not interpret the result b) Does it appear that jogging at least 15 miles per week reduces the mean puilse rate for adult males? Explain your answer c) How many adult males should be sampled to be 99% sure that the sample mean pulse rate is within 2.0 beats minute of the true mean pulse rate of the adult male population?

Answer 1