The average score of employees on a mental examination is 120. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 30. If a random sample of 90 scores were selected and the sample mean were calculated to be 110, what is the probability that the mean of the sample is greater than 110? Show the complete solution.
The average score of employees on a mental examination is 120. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 30. If a random sample of 90 scores were selected and the sample mean were calculated to be 110, what is the probability that the mean of the sample is greater than 110? Show the complete solution.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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![The average score of employees on a mental
examination is 120. Suppose that nothing is
known about the shape of the distribution and that
the standard deviation is 30. If a
random sample of 90 scores were selected and the
sample mean were calculated to be 110,
what is the probability that the mean of the sample
is greater than 110? Show the complete solution.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F922a8110-9ba7-4aea-99bb-a68a755eaf36%2F9ad0f372-d1df-4845-bcde-76c6ee5163dc%2Fe6jyf37_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The average score of employees on a mental
examination is 120. Suppose that nothing is
known about the shape of the distribution and that
the standard deviation is 30. If a
random sample of 90 scores were selected and the
sample mean were calculated to be 110,
what is the probability that the mean of the sample
is greater than 110? Show the complete solution.
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