Answered step by step
Verified Expert Solution
Link Copied!

Question

...
1 Approved Answer

Two samples were taken respectively from two normal populations of means m, and m, (unknown) but of common variances s2 100. The means of each

image text in transcribed
Two samples were taken respectively from two normal populations of means m, and m, (unknown) but of common variances s2 100. The means of each sample are presented in the table below. We are interested in the difference of the means. Also provided below is an Excel report of the hypothesis tests on two possible means at the 5% significance level. Sample #1 Sample #2 n = 25 n, = 20 x, = 125 X, = 120 Data Difference between means (hypothesis), m, - m, = 0 Meaning threshold a = 0.05 Sample #1 Sample size 25 n Sample mean 125 Estimated population standard deviation 10 Sample #2 Sample size n 20 Sample mean Estimated 120 population standard deviation 10 Intermediate Calculations Sampling standard deviation 3.0000 Sampling difference 5 Z-statistic 1.6667 Bilateral test Lower critical value (Zc1) -1.960 Upper critical value (Zca) 1.960 Lower critical value -5.880 Upper critical value Only 5,880 descriptive-a One-tailed test on the right Upper critical value (Ze) 1.6449 Upper critical value Descriptive 4.9346 threshold-a From the information provided, what would be your decision for a right one-sided test

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access with AI-Powered Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Practicing Statistics Guided Investigations For The Second Course

Authors: Shonda Kuiper, Jeff Sklar

1st Edition

9780321586018

Students also viewed these Mathematics questions