Claim: The standard deviation of pulse rates of adult males is less than 12 bpm. For a random sample of 160 adult​ males, the pulse rates have a standard deviation of 10.7 bpm. Find the value of the test statistic.   The value of the test statistic is :

Use z scores to compare the given values. In a recent awards ceremony, the age of the winner for best actor was 33 and the age of the winner for best actress was 47. For all best actors, the mean age is 44.4 years and the standard deviation is 6.5 years. For all best actresses, the mean age is 32.8 years and the standard deviation is 11.2 years. (All ages are determined at the time of the awards ceremony.) Relative to their genders, who had the more extreme age when winning the award, the actor or the actress? Explain. Since the z score for the actor is z= and the z score for the actress is z = the V had the more extreme age. (Round to two decimal places.)

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 149 adult males, the mean pulse rate is 67.6 bpm and the standard deviation is 10.7 bpm. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69 bpm. For a random sample of 156 adult males, the mean pulse rate is 70.2 bpm and the standard deviation is 11.1 bpm. Find the value of the test statistic. The value of the test statistic is (Round to two decimal places as needed.)