← The state test scores for 12 randomly selected high school seniors are s below. Assume the population is normally distributed. (a) Find the sample mean. x= 908.9 (Round to one decimal place as needed.) (b) Find the sample standard deviation.

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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Plz help asap 5.
←
@
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.
View an example Get more help.
2
(a) Find the sample mean.
x= 908.9 (Round to one decimal place as needed.)
(b) Find the sample standard deviation.
s= 302.7 (Round to one decimal place as needed.)
(c) Construct a 90% confidence interval for the population mean u.
A 90% confience interval for the population mean is ().
(Round to one decimal place as needed.)
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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. Assume the population is normally distributed. View an example Get more help. 2 (a) Find the sample mean. x= 908.9 (Round to one decimal place as needed.) (b) Find the sample standard deviation. s= 302.7 (Round to one decimal place as needed.) (c) Construct a 90% confidence interval for the population mean u. A 90% confience interval for the population mean is (). (Round to one decimal place as needed.) W S X H mand # 3 E D C $ 4 R F % 5 V T G ^ 6 B MacBook Pro Y H & 7 N U J * 00 8 - M ( - 9 K O < I H 1420 696 725 625 :) 0 L command P л. > Clear all | 1 1225 721 749 1440 I { [ option + " 21 = ? 986 832 547 941 Check answ I 11 B } -
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