A random sample is selected from a normal popula- tion with a mean of u = 40 and a standard deviation of o = 10. After a treatment is administered to the %3D individuals in the sample, the sample mean is found to be M = 46. a. How large a sample is necessary for this sample mean to be statistically significant? Assume a two- tailed test with a = .05. b. If the sample mean were M = 43, what sample size is needed to be significant for a two-tailed test with %3D a = .05? %3D
A random sample is selected from a normal popula- tion with a mean of u = 40 and a standard deviation of o = 10. After a treatment is administered to the %3D individuals in the sample, the sample mean is found to be M = 46. a. How large a sample is necessary for this sample mean to be statistically significant? Assume a two- tailed test with a = .05. b. If the sample mean were M = 43, what sample size is needed to be significant for a two-tailed test with %3D a = .05? %3D
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Topic Video
Question
![A random sample is selected from a normal popula-
tion with a mean of u = 40 and a standard deviation
of o = 10. After a treatment is administered to the
%3D
individuals in the sample, the sample mean is found to
be M = 46.
a. How large a sample is necessary for this sample
mean to be statistically significant? Assume a two-
tailed test with a = .05.
b. If the sample mean were M = 43, what sample size
is needed to be significant for a two-tailed test with
%3D
a = .05?
%3D](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3a6bc6cd-a2b7-4407-bd4e-8e7878cf3c5f%2F955a0aa6-f09f-4699-8210-1b380a80320b%2Fgv26hx_reoriented.jpeg&w=3840&q=75)
Transcribed Image Text:A random sample is selected from a normal popula-
tion with a mean of u = 40 and a standard deviation
of o = 10. After a treatment is administered to the
%3D
individuals in the sample, the sample mean is found to
be M = 46.
a. How large a sample is necessary for this sample
mean to be statistically significant? Assume a two-
tailed test with a = .05.
b. If the sample mean were M = 43, what sample size
is needed to be significant for a two-tailed test with
%3D
a = .05?
%3D
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