# 989 The state test scores for 12 randomly selected high school seniors are shown on the...

###### Question: 989 The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. 1424 695 725 623 1221 721 745 1442 837 544 947 (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 H. A 95% confidence interval for the population mean is (1.0). (Round to one decimal nlace as needed)

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