The state test scores for 12 randomly selected high school seniors are shown Complete parts (a) through (c) below Assume the population is normally distributed 1423 1229 987 692 726 833 724 742 541 628 1444 946 (a) Find the sample mean x (Round to one decimal place as needed ) (b) Find the sample s...

1422122969 692 126 833t 9 142 sYt 62tl44 94c 9 Somplemeanx 12 ...

The state test scores for 12 randomly selected high school seniors are shown : Complete parts (a)

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The state test scores for 12 randomly selected high school seniors are shown :

Complete parts (a) through (c) below.

Assume the population is normally distributed.

1423	1229	987
692	726	833
724	742	541
628	1444	946

(a) Find the sample mean.

(Round to one decimal place as needed.)

(b) Find the sample standard deviation.

(Round to one decimal place as? needed.)

A 90% confidence interval for the population mean is ( , ).

(Round to one decimal place as needed.)

Related Book For answer-question

Elementary Statistics Picturing the World

ISBN: 978-0321911216

6th edition

Authors: Ron Larson, Betsy Farber

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Posted Date: Dec 31, 2020 09:21 AM

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Margin of error = $$5$, standard deviation = $$20$
Margin of error = 18.2 cm, standard deviation = 95.2 cm
Margin of error = 0.5 g, standard deviation = 8.7 g

The state test scores for 12 randomly selected high school seniors are shown : Complete parts (a)

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Elementary Statistics Picturing the World

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