Question

I. USE THE INFORMATION BELOW TO ANSWER PROBLEMS A researcher wished to test a claim that the proportion of black drivers stopped by the police is higher than that of white drivers. The black drivers will be considered population 1 and the white drivers as population 2 1. Pick the most appropriate answer below concerning the formulation of the null and alternative hypotheses to determine whether the data provide sufficient evidence to conclude that the proportion black drivers stopped by police (pop 1) is higher than that of white drivers stopped by the police (pop 2). a) Ho:11 - H2 = 0 HA: H1 - H2 > 0 b) Ho:P: - P2 = 0 HA:P - P20 H:P- P2 = 0 HA: P.-P2 > 0 d) Can't answer based on the information given. None of the above e) 2. of the test statistic for the test is z* = 0.64 , what would be the p-value for the test? a) 0.2611 b) 0.7389 c) 0.2630 d) Can't answer based on the information given. e) None of the above 3. a) b) If the test statistic for the test is z* = 0.64 , then, at the 10% significance level what would be the conclusion for the test? There is sufficient evidence to conclude He is true. There is insufficient evidence to conclude He is true. None of the above are correct. Choose the most appropriate statement below for the conclusion of the hypothesis test. a) At the 10% significance level, there is sufficient evidence to conclude that the true proportion of black drivers stopped by the police (pop 1) is higher than the true proportion of white drivers stopped by the police (pop 2). At the 10% significance level, there is insufficient evidence to conclude that the true PAGE 1 OF 1 88 WORDS B ave b)

Answer 1

1.

(C) H_{​​​​​​0} : p_{​​​​​​1} - p_{​​​​​​2} = 0

H_{​​​​​​A} : p_{​​​​​​1} - p_{​​​​​​2} > 0

2.

P-value = 0.2610863 $\simeq$ 0.2611

(A) 0.2611

3.

(B) There is insufficient evidence to conclude H_{​​​​A}is true.

4.

Option A is appropriate.

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