The state test scores for 12 randomly selected high school seniors are shown : Complete parts (a)
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Question:
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 standard deviation.
s=
(Round to one decimal place as? needed.)
(c) Construct a 90% confidence interval for the population mean
A 90% confidence interval for the population mean is ( , ).
(Round to one decimal place as needed.)
Related Book For
Elementary Statistics Picturing the World
ISBN: 978-0321911216
6th edition
Authors: Ron Larson, Betsy Farber
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