If you assign numeric values to the upper case alphabet (A= 0, B=1, Z=25) 1)what is A + N
2) What is C - 10
3)What is A + 6

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%