Which of the following statements are true? The pooled-variances t-test is used whenever the population standard deviations are assumed to be equal regardless of the sample size. The unequal-variances t-test is used whenever the population standard deviations are unknown and cannot be assumed to be equal. The z-test can be used as a close approximation to the unequal-variances t-test when the population standard deviations are not assumed to be equal, but samples are large (each n 30). All of these statements are true. None of these statements is true
Which of the following statements are true? The pooled-variances t-test is used whenever the population standard deviations are assumed to be equal regardless of the sample size. The unequal-variances t-test is used whenever the population standard deviations are unknown and cannot be assumed to be equal. The z-test can be used as a close approximation to the unequal-variances t-test when the population standard deviations are not assumed to be equal, but samples are large (each n 30). All of these statements are true. None of these statements is true
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Which of the following statements are true?
-
The pooled-variances t-test is used whenever the population standard deviations are assumed to be equal regardless of the
sample size . -
The unequal-variances t-test is used whenever the population standard deviations are unknown and cannot be assumed to be equal.
-
The z-test can be used as a close approximation to the unequal-variances t-test when the population standard deviations are not assumed to be equal, but samples are large (each n 30).
-
All of these statements are true.
-
None of these statements is true.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
