6. On paper. Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each of two normal populations: 1. Calculate s^2, the pooled estimator of σ^2. 2.Find a 90% confidence interval for (µ1−µ2), the difference between two population means. 3.Test H0 : (µ1 − µ2) = 0 against Ha : (µ1 − µ2) < 0 for α = 0.05. State your conclusions

6. On paper. Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each of two normal populations: 1. Calculate s^2, the pooled estimator of σ^2. 2.Find a 90% confidence interval for (µ1−µ2), the difference between two population means. 3.Test H0 : (µ1 − µ2) = 0 against Ha : (µ1 − µ2) < 0 for α = 0.05. State your conclusions

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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