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%. The margin of error of the sample
mean is 83.71%.
Answer: one value
Step-by-step explanation:
8 - x = 9
collecting the like terms
x = 8 - 9
x = -1
Answer:
15.60 times 100 divided by 390=4%
Step-by-step explanation:
120 degrees or 0.67 radians