The mean consumption of water per household in a city was 1248 cubic feet per month. Due to a water shortage because of a drought, the city council campaigned for water use conservation by households. A few months after the campaign was started, the mean consumption of water for a sample of 99 households was found to be 1166 cubic feet per month. The population standard deviation is given to be 219 cubic feet. a. Find the p-value for the hypothesis test that the mean consumption of water per household has decreased due to the campaign by the city council. Would you reject the null hypothesis at α = 0.05? Round your answer to four decimal places. p-value = i We ✰ Ho. b. Make the test of part a using the critical-value approach and α = 0.05. Round your answer for z to two decimal places. Zobserved We Ho. We conclude that the mean consumption of water per household has due to the campaign by the city council.

The mean consumption of water per household in a city was 1248 cubic feet per month. Due to a water shortage because of a drought, the city council campaigned for water use conservation by households. A few months after the campaign was started, the mean consumption of water for a sample of 99 households was found to be 1166 cubic feet per month. The population standard deviation is given to be 219 cubic feet. a. Find the p-value for the hypothesis test that the mean consumption of water per household has decreased due to the campaign by the city council. Would you reject the null hypothesis at α = 0.05? Round your answer to four decimal places. p-value = i We ✰ Ho. b. Make the test of part a using the critical-value approach and α = 0.05. Round your answer for z to two decimal places. Zobserved We Ho. We conclude that the mean consumption of water per household has due to the campaign by the city council.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 13PPS

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