6.2 This quiz: 17 point(s) possible Question 12 of 17 > This question: 1 point(s) possible Submit quiz The state test scores for 12 randomly selected high school seniors are shown on the right. Complete parts (a) through (c) below. 1425 1227 987 691 726 830 Assume the population is normally distributed. 728 748 543 629 1449 940 (a) Find the sample mean. x=(Round to one decimal place as needed.) (b) Find the sample standard deviation. SE (Round to one decimal place as needed.) (c) Construct a 99% confidence interval for the population mean μ A 99% confidence interval for the population mean is (0) (Round to one decimal place as needed.) S4 F4 3 E R Q Search F5 1+ F6 F7 & 805 % 7 6 29 Y U F8 * 8 00 D F G H V B N M F9 K 9 DP F10 COD YS Delete F11 F12 Insert PrtSc P E [ ? + II 11 ] Backspace Num Lock PgUp Enter Alt Ctrl Home PgDn Next 4:58 PM 3/18/2024 Home 144 PRE 6 * 00 L Shift End + 3 2

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