The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1422 1226 985 700 728 836 Assume the population is normally distributed. 720 743 542 621 1442 940 (a) Find the sample mean. x= (Round to one decimal place as needed.) (b) Find the sample standard deviation. S= (Round to one decimal place as needed.) (c) Construct a 95% confidence interval for the population mean u. A 95% confidence interval for the population mean is ( ). (Round to one decimal place as needed.)

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The state test scores for 12 randomly selected high school seniors are shown on the right. Complete
parts (a) through (c) below.
1422
1226
985
700
728
836
Assume the population is normally distributed.
720
743
542
621
1442
940
(a) Find the sample mean.
x= (Round to one decimal place as needed.)
(b) Find the sample standard deviation.
(Round to one decimal place as needed.)
(c) Construct a 95% confidence interval for the population mean u.
A 95% confidence interval for the population mean is
(Round to one decimal place as needed.)
Enter your answer in each of the answer boxes.
Transcribed Image Text:The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1422 1226 985 700 728 836 Assume the population is normally distributed. 720 743 542 621 1442 940 (a) Find the sample mean. x= (Round to one decimal place as needed.) (b) Find the sample standard deviation. (Round to one decimal place as needed.) (c) Construct a 95% confidence interval for the population mean u. A 95% confidence interval for the population mean is (Round to one decimal place as needed.) Enter your answer in each of the answer boxes.
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