Mathematics, 17.11.2020 05:50 cristinaarmijo1

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%
с.
1.11%
D.
2.22%

Answers: 3

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