1. Hypothesis Test for Independent Groups Two Means
Two different computer firms manufacture laptop computers. Random samples are selected from each firm and the following data is collected.
Firm A: nA=20 sA=$ = $1500
Firm B: nB=22 sB=$ = $1900
Test the claim that the average price of Firm A’s laptop is no different from the average price of Firm B’s laptop
Ho: uA = µB Ha: uA ≠ uB

2. Hypothesis Test for Independent Groups Two Means
= difference between the average price of Firm A’s and Firm B’s laptops
Distribution for the Test: Student-t for the difference of two means

3. Hypothesis Test for Independent Groups Two Means
USE A 2-SampTTest.
Test statistic: t = -8.31
Standardized score for
p-value: ≈ 0

4. Hypothesis Test for Independent Groups Two Means
Decision: Assume
REJECT H0.
Conclusion: There is sufficient evidence to conclude that the average price of Firm A’s laptop is different from the average price of Firm B’ laptop.