?Which of the following statements is correct X-Y-Do T = A O the pooled-variances t-test: is used whenever the population standard deviations can be assumed to Sp n1 n2 .be equal .the z-test can be used when the population standard deviation are known regardless of the sample sizes .BO all of the statements are true .C O the z-test can be used when the population standard deviation are unknown but sample sizes are large (typically greater .D O than 30)

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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?Which of the following statements is correct
X-Y-Do
T =
the pooled-variances t-test :
A O
is used whenever the population standard deviations can be assumed to
.be equal
.the z-test can be used when the population standard deviation are known regardless of the sample sizes .BO
all of the statements are true .C O
the z-test can be used when the population standard deviation are unknown but sample sizes are large (typically greater .D O
than 30)
none of the statements are true. .E O
Transcribed Image Text:?Which of the following statements is correct X-Y-Do T = the pooled-variances t-test : A O is used whenever the population standard deviations can be assumed to .be equal .the z-test can be used when the population standard deviation are known regardless of the sample sizes .BO all of the statements are true .C O the z-test can be used when the population standard deviation are unknown but sample sizes are large (typically greater .D O than 30) none of the statements are true. .E O
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