A consumer survey indicates that the average household spends μ = $155 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation of σ=$25.  a. what proportion of the population spends more than $175 per week on groceries? b. what is the probability of randomly selecting a family that spends less than $100 per week groceries? c. how much money do you need to spend on groceries each week to be in the top 20% of the distribution?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A consumer survey indicates that the average household spends μ = $155 on groceries each week. The distribution of spending amounts is approximately normal with a standard deviation of σ=$25. 

a. what proportion of the population spends more than $175 per week on groceries?

b. what is the probability of randomly selecting a family that spends less than $100 per week 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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