Which equation could be used to solve the problem?
oscar averaged 4 yards per carry in the football game.
if he carried the ball 16 times, how many yards did he gain (y)?
a.
y = 4 + 16
b.
y = 4 • 16
c.
y = 16 ÷ 4
d.
y = 4 ÷ 16

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%