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Six hundred adult Americans were asked by telephone poll, "What do you think constitutes a middle-class income?" The results are below. Also, include left endpoint, but not the right endpoint. Salary ($) Relative Frequency < 20,000 0.02 20,000-25,000 0.09 25,000-30,000 0.19 30,000-40,000 0.26 40,000-50,000 0.18 50,000-75,000 0.17 75,000-99,999 0.02 100,000+ 0.01 a. What proportion of the respondents answered "not sure"? b. What proportion think that middle-class is from $25,000 to $50,000?

Six hundred adult Americans were asked by telephone poll, "What do you think constitutes a middle-class income?" The results are below. Also, include left endpoint, but not the right endpoint. Salary ($) Relative Frequency < 20,000 0.02 20,000-25,000 0.09 25,000-30,000 0.19 30,000-40,000 0.26 40,000-50,000 0.18 50,000-75,000 0.17 75,000-99,999 0.02 100,000+ 0.01 a. What proportion of the respondents answered "not sure"? b. What proportion think that middle-class is from $25,000 to $50,000?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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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Six hundred adult Americans were asked by telephone poll, "What do you think constitutes a middle-class income?" The results are below. Also, include left endpoint, but not the right endpoint. Salary ($) Relative Frequency < 20,000 0.02 20,000-25,000 0.09 25,000-30,000 0.19 30,000-40,000 0.26 40,000-50,000 0.18 50,000-75,000 0.17 75,000-99,999 0.02 100,000+ 0.01 a. What proportion of the respondents answered "not sure"? b. What proportion think that middle-class is from $25,000 to $50,000?
Transcribed Image Text:Six hundred adult Americans were asked by telephone poll, "What do you think constitutes a middle-class income?" The results are below. Also, include left endpoint, but not the right endpoint. Salary ($) Relative Frequency < 20,000 0.02 20,000-25,000 0.09 25,000-30,000 0.19 30,000-40,000 0.26 40,000-50,000 0.18 50,000-75,000 0.17 75,000-99,999 0.02 100,000+ 0.01 a. What proportion of the respondents answered "not sure"? b. What proportion think that middle-class is from $25,000 to $50,000?
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