Question: Repeat Problem 10 12 a assuming that the population variances in

Repeat Problem 10.12 (a), assuming that the population variances in the two branches are not equal. Compare these results with those of Problem 10.12 (a).
Problem 10.12 (a)
t Test for Differences in Two Means 
Data 
Hypothesized Difference 
0 
Level of Significance 
0.05 
Population 1 Sample 
Sample Size 
15 
Sample Mean 
4.286667 
Sample Standard Deviation 
1.637985 
Population 2 Sample 
Sample Size 
15 
Sample Mean 
7.114667 
Sample Standard Deviation 
2.082189 
Intermediate Calculations 
Population 1 Sample Degrees of Freedom 
14 
Population 2 Sample Degrees of Freedom 
14 
Total Degrees of Freedom 
28 
Pooled Variance 
3.509254 
Difference in Sample Means 
-2.828 
t-Test Statistic 
-4.13431 
Two-Tailed Test 
Lower Critical Value 
-2.04841 
Upper Critical Value 
2.048409 
p-Value 
0.000293 
Reject the null hypothesis 


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  • CreatedJuly 16, 2015
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