A sample of 60 maids from country A earn an average of RM300 per week with a standard deviation of RM16. While a sample of 60 maids from country B earn an average of RM250 per week with standard deviation RM18. Test at 5% significance level that country A maids mean earning exceed country B by more than RM40 per week. Assume the population variances are not equal.
A sample of 60 maids from country A earn an average of RM300 per week with a standard deviation of RM16. While a sample of 60 maids from country B earn an average of RM250 per week with standard deviation RM18. Test at 5% significance level that country A maids mean earning exceed country B by more than RM40 per week. Assume the population variances are not equal.
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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100%
Answer: Z-test = 3.22, reject Ho
Transcribed Image Text:A sample of 60 maids from country A earn an average of RM300 per week
with a standard deviation of RM16. While a sample of 60 maids from country
B earn an average of RM250 per week with standard deviation RM18.
Test at 5% significance level that country A maids mean earning exceed
country B by more than RM40 per week.
Assume the population variances are not equal.
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