In Testing the Hypotheses:
H₀: P₁ - P₂ = 0 $\neq$

question 9

Essay

In testing the hypotheses:
H₀: p₁ - p₂ = 0.10
H₁ : p₁ - p₂ ? $\neq$ 0.10,
we find the following statistics:
n₁ = 150, x₁ = 72.
n₂ = 175, x₂ = 70.
a. Estimate with 95% confidence the difference between the two population proportions.
b. Explain how to use the confidence interval in part a. to test the hypotheses.

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