Section 2. Suppose that you work for a government sector for water resources management. Your section is responsible for estimating the required amount of water for household use. Assume that the volume of daily water use per household in North America follows a normal distribution. The mean volume of daily water use is 138 gallons per household and the standard deviation is 46 gallons.

Section 2. Suppose that you work for a government sector for water resources management. Your section is responsible for estimating the required amount of water for household use. Assume that the volume of daily water use per household in North America follows a normal distribution. The mean volume of daily water use is 138 gallons per household and the standard deviation is 46 gallons.

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015

1st Edition

ISBN:9781680331141

Author:HOUGHTON MIFFLIN HARCOURT

Publisher:HOUGHTON MIFFLIN HARCOURT

Chapter11: Data Analysis And Displays

Section11.3: Shapes Of Distributions

Problem 8Q

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Question

Using the image answer the following. Find the 90th percentile of the vaule of daily water use per household in gallon. Use the formula or z-score and either z-table or calculator.