THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 41

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
Two samples each of size 20 are taken from independent populations assumed to be normally distributed with equal variances.The first sample has a mean of 43.5 and standard deviation of 4.1 while the second sample has a mean of 40.1 and standard deviation of 3.2.A researcher would like to test if there is a difference between the population means at the 0.05 significance level.
-State the null hypothesis.

• A)H₀ : P_x = P_y
• B)H₀ : =
• C)H₀ : μ_x - μ_y = 3.4
• D)H₀ : μ_x - μ_y = 0

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Definitions:

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