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7. Let n1 = 80, X1 = 50, n2 = 80, and X2 = 70. Complete parts (a) and (b) below. a. At the 0.10 level of significance, is there evidence of a significant difference between the two population proportions? Determine the null and alternative hypotheses. Choose the correct answer below. A. H0: ?1 ? ?2 H1: ?1 > ?2 B. H0: ?1 = ?2 H1: ?1 ? ?2 C. H0: ?1 ? ?2 H1: ?1 < ?2 D. H0: ?1 ? ?2 H1: ?1 = ?2 Calculate the test statistic, ZSTAT, based on the difference p1 - p2. The test statistic, ZSTAT, is . (Type an integer or a decimal. Round to two decimal places as needed.) Calculate the p-value. The p-value is . (Type an integer or a decimal. Round to three decimal places as needed.) Determine a conclusion. Choose the correct answer below. (1) the null hypothesis. There is (2) evidence to support the claim that there is a significant difference between the two population proportions. b. Construct a 90% confidence interval estimate of the difference between the two population proportions. ? ?1 - ?2 ? (Type integers or decimals. Round to four decimal places as needed.) (1) Do not reject Reject (2) sufficient insufficient

          7. Let n1 = 80, X1 = 50, n2 = 80, and X2 = 70. Complete parts (a) and (b) below.

a. At the 0.10 level of significance, is there evidence of a significant difference between the two population proportions?
Determine the null and alternative hypotheses. Choose the correct answer below.

A. H0: ?1 ? ?2
H1: ?1 > ?2

B. H0: ?1 = ?2
H1: ?1 ? ?2

C. H0: ?1 ? ?2
H1: ?1 < ?2

D. H0: ?1 ? ?2
H1: ?1 = ?2

Calculate the test statistic, ZSTAT, based on the difference p1 - p2.

The test statistic, ZSTAT, is ________.
(Type an integer or a decimal. Round to two decimal places as needed.)

Calculate the p-value.

The p-value is ________.
(Type an integer or a decimal. Round to three decimal places as needed.)

Determine a conclusion. Choose the correct answer below.

(1) ________ the null hypothesis. There is (2) ________ evidence to support the claim that there is a significant difference between the two population proportions.

b. Construct a 90% confidence interval estimate of the difference between the two population proportions.

________ ? ?1 - ?2 ? ________
(Type integers or decimals. Round to four decimal places as needed.)

(1) Do not reject
Reject

(2) sufficient
insufficient

7. Let n1 = 80, X1 = 50, n2 = 80, and X2 = 70. Complete parts (a) and (b) below.

a. At the 0.10 level of significance, is there evidence of a significant difference between the two population proportions?
Determine the null and alternative hypotheses. Choose the correct answer below.

A. H0: ?1 ? ?2
H1: ?1 > ?2

B. H0: ?1 = ?2
H1: ?1 ? ?2

C. H0: ?1 ? ?2
H1: ?1 < ?2

D. H0: ?1 ? ?2
H1: ?1 = ?2

Calculate the test statistic, ZSTAT, based on the difference p1 - p2.

The test statistic, ZSTAT, is .
(Type an integer or a decimal. Round to two decimal places as needed.)

Calculate the p-value.

The p-value is .
(Type an integer or a decimal. Round to three decimal places as needed.)

Determine a conclusion. Choose the correct answer below.

(1) the null hypothesis. There is (2) evidence to support the claim that there is a significant difference between the two population proportions.

b. Construct a 90% confidence interval estimate of the difference between the two population proportions.

? ?1 - ?2 ?
(Type integers or decimals. Round to four decimal places as needed.)

(1) Do not reject
Reject

(2) sufficient
insufficient

Added by Valerie G.

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