The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of 8.5. If a sample of 40 test takers are selected at random, what is the probability that the mean score of this group is higher than 85?
The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of 8.5. If a sample of 40 test takers are selected at random, what is the probability that the mean score of this group is higher than 85?
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 3GP
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![The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of 8.5.
If a sample of 40 test takers are selected at random, what is the probability that the mean score of
this group is higher than 85?
A
50%
B 25%
© 0%
100%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7178b353-e247-425b-84b6-e33a7df0f469%2Fcc63d66e-a179-49c4-a262-5b5b6f5ae177%2Fxcv4fqo_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of 8.5.
If a sample of 40 test takers are selected at random, what is the probability that the mean score of
this group is higher than 85?
A
50%
B 25%
© 0%
100%
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