Students in a class are standing in a circle. Each student holds a string to every other student except for the student to their
right and to their left. If there are 299 strings being held, how
many students are in the class? Show you work. Enter
the answer.

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%