An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all high school teachers. A. (54837.9 , 58142.1) B. (54637.9 , 60142.1) C. (54607.2 , 58372.8) D. (55398.7 , 57581.3 )
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all high school teachers. A. (54837.9 , 58142.1) B. (54637.9 , 60142.1) C. (54607.2 , 58372.8) D. (55398.7 , 57581.3 )
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary of all high school teachers.
A. |
(54837.9 , 58142.1)
|
|
B. |
(54637.9 , 60142.1)
|
|
C. |
(54607.2 , 58372.8)
|
|
D. |
(55398.7 , 57581.3 )
|
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