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A consumer survey indicates that the average household spends μ = $185 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation of σ = $25. Based on this distribution. a. What proportion of the population spends more than $200 per week on groceries? b. What is the probability of randomly selecting a family that spends less than $150 per week on groceries? c. How much money do you need to spend on groceries each week to be in the top 20% of the distribution

BuyFind

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570
BuyFind

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570

Solutions

Chapter
Section
Chapter 6, Problem 19P
Textbook Problem

A consumer survey indicates that the average household spends μ = $185 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation of σ = $25. Based on this distribution.

  • a. What proportion of the population spends more than $200 per week on groceries?
  • b. What is the probability of randomly selecting a family that spends less than $150 per week on groceries?
  • c. How much money do you need to spend on groceries each week to be in the top 20% of the distribution

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