What is the area of the figure times 15

The heaviest 16% of all men in weight weigh more than how many pounds ?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false