Question

A two-proportions z-test is to be performed using the  approach. Use the given sample data to find...

A two-proportions z-test is to be performed using the  approach. Use the given sample data to find the P-value for the hypothesis test.

x 1 = 41, n 1 = 100, x 2 = 35, n 2 = 140; H 0: p 1 = p 2, H a: p 1 > p 2 , α = 0.10

0.4211

0.0086

0.0512

0.0043

Homework Answers

Answer #1

Given the hypotheses are:

H0: p 1 = p 2,

Ha: p 1 > p 2

Based on the hypothesis it will be right tailed two sample test.

Given details are:

In favour values are:

x 1 = 41, x 2 = 35

and the sample sizes are:

n 1 = 100, , n 2 = 140

The significance level is α = 0.10

Thus the sample proportions are calculated as:

and the pooled proportion is computed as:

Rejection region:

P-value approach:

Reject the Ho if P-value is less than 0.10.

Test statistic:

P-value:

The P-value is calculated using the excel formula for normal distribution which is =1-NORM.S.DIST(2.627, TRUE), thus the p-value is computed as:

P-value = 0.0043

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