Question

Two independent random samples of sizes n1= 4 and n2=5 are selected from each of two...

Two independent random samples of sizes n1= 4 and n2=5 are selected from each of two normal populations:

Population 1: 12 3 8 5

Population 2: 14 7 7 9 5

use a=0.5

What is the correct Test Statistic:

A. 5.2889

B. 2.795

C. 2.771

D. 2.575

Math   Statistics-And-Probability   
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Answer #1

First we need to find the mean and standard deviation of both samples. Following is the output of descriptive statistics:

Descriptive statistics
X1 X2
count 4 5
mean 7.00 8.40
sample standard deviation 3.92 3.44
sample variance 15.33 11.80
minimum 3 5
maximum 12 14
range 9 9

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