A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample mean and standard deviation. 29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18 a. 20.50, 5.79 b. 20.50, 5.94 c. 20.85, 5.79 d. 20.85, 5.94

A national random sample of 20 ACT scores from 2010 is listed below. Calculate the sample mean and standard deviation.

29, 26, 13, 23, 23, 25, 17, 22, 17, 19, 12, 26, 30, 30, 18, 14, 12, 26, 17, 18

a. 20.50, 5.79

b. 20.50, 5.94

c. 20.85, 5.79

d. 20.85, 5.94
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2 Answers

Answer :

d. 20.85, 5.94
by

Answer :

Katie earned 84,92,84,75 and 70 on her first 5 tests. What is the minimum grade Katie needs to earn on the next test to have a mean of 84?
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