he state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through 14 ) below. 69 72 ssume the population is normally distributed. 62 Find the sample mean. (Round to one decimal place as needed.) O Find the sample standard deviation. (Round to one decimal place as needed.) Construct a 95% confidence interval for the population mean u. 95% confidence interval for the population mean is (O). ound 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 1427
1226
983
(c) below.
692
720
836
727
747
550
Assume the population is normally distributed.
621
1449
946
(a) Find the sample mean.
x=D (Round to one decimal place as needed.)
x%3D
(b) Find the sample standard deviation.
(Round to one decimal place as needed.)
S=
(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.)
Transcribed Image Text:The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through 1427 1226 983 (c) below. 692 720 836 727 747 550 Assume the population is normally distributed. 621 1449 946 (a) Find the sample mean. x=D (Round to one decimal place as needed.) x%3D (b) Find the sample standard deviation. (Round to one decimal place as needed.) S= (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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