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What is the test statistic?

What is the test statistic?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The telephone company wants to investigate the desirability of beginning a marketing campaign that would offer customers the right to purchase an additional telephone line at a substantially reduced installation cost. The campaign will be initiated if there is evidence that more than 20% of the customers would consider purchasing an additional telephone line if it were made available at a substantially reduced installation cost. A random sample of 500 households is selected. The results indicate that 123 of households would purchase the additional telephone line at a reduced installation cost. Complete parts a and b. Click here to view page 1 of the Normal table. Click here to view page 2 of the Normal table. ..... a. At the 0.05 level of significance, is there evidence that more than 20% of customers would purchase the additional telephone line? Let a be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho:a s 0.20 H,: n > 0.20 What is the test statistic? ZSTAT =| |(Round to two decimal places as needed.)
Transcribed Image Text:The telephone company wants to investigate the desirability of beginning a marketing campaign that would offer customers the right to purchase an additional telephone line at a substantially reduced installation cost. The campaign will be initiated if there is evidence that more than 20% of the customers would consider purchasing an additional telephone line if it were made available at a substantially reduced installation cost. A random sample of 500 households is selected. The results indicate that 123 of households would purchase the additional telephone line at a reduced installation cost. Complete parts a and b. Click here to view page 1 of the Normal table. Click here to view page 2 of the Normal table. ..... a. At the 0.05 level of significance, is there evidence that more than 20% of customers would purchase the additional telephone line? Let a be the population proportion. Determine the null hypothesis, Ho, and the alternative hypothesis, H,. Ho:a s 0.20 H,: n > 0.20 What is the test statistic? ZSTAT =| |(Round to two decimal places as needed.)
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