Question

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 


$1.99
Sales1
Views127
Comments0
  • CreatedJuly 16, 2015
  • Files Included
Post your question
5000