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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%
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Which of the following is the graph of y= square root -x-3
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Mathematics, 21.06.2019 23:00
Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?
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