The mean consumption of water per household in a city was 1201 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 96 households was found to be 1153 cubic feet per month. The population standard deviation is given to be 249 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 a = 0.01? Round your answer to four decimal places. p-value = i We b. Make the test of part a using the critical-value approach and α = 0.01. Round your answer for z to two decimal places. Zobserved = Ho. We ✓ Ho. We conclude that the mean consumption of water per household has by the city council. due to the campaign
The mean consumption of water per household in a city was 1201 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 96 households was found to be 1153 cubic feet per month. The population standard deviation is given to be 249 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 a = 0.01? Round your answer to four decimal places. p-value = i We b. Make the test of part a using the critical-value approach and α = 0.01. Round your answer for z to two decimal places. Zobserved = Ho. We ✓ Ho. We conclude that the mean consumption of water per household has by the city council. due to the campaign
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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