A researcher wishes to analyze the difference between two population means. A sample of 8 items from population A yields a mean of 185 with a standard deviation of 20. A sample of 7 items from population B yields a mean of 200 with a standard deviation of 25. a) Can the variances from the two populations be considered equal? Justify your answer. b) A two-sided hypothesis test comparing the population means will use percentiles from what probability distribution? Compute any required degrees of freedom but *do not* perform the test.
A researcher wishes to analyze the difference between two population means. A sample of 8 items from population A yields a mean of 185 with a standard deviation of 20. A sample of 7 items from population B yields a mean of 200 with a standard deviation of 25. a) Can the variances from the two populations be considered equal? Justify your answer. b) A two-sided hypothesis test comparing the population means will use percentiles from what probability distribution? Compute any required degrees of freedom but *do not* perform the test.
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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A researcher wishes to analyze the difference between two population means. A sample of 8 items from population A yields a mean of 185 with a standard deviation of 20. A sample of 7 items from population B yields a mean of 200 with a standard deviation of 25. a) Can the variances from the two populations be considered equal? Justify your answer. b) A two-sided hypothesis test comparing the population means will use percentiles from what probability distribution? Compute any required degrees of freedom but *do not* perform the test.
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