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

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).

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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