S Mann, Introductory Statistics, 9e INTRO STATS. (MQM 100) STANDARD VIEW PRINTER

Question

S Mann, Introductory Statistics, 9e INTRO STATS. (MQM 100) STANDARD VIEW PRINTER VERSION BACK NEXT Chapter 04, Section 4.2, Problem 027 In a sample of 500 families, 90 have a yearly income of less than $50,000, 180 have a yearly income of $ 50,000 to $ 100,000, and the remaining families have a yearly income of more than $ 100,000. Write the frequency distribution table for this problem. Calculate the relative frequencies for all classes Income Frequency Relative Frequency Less than $ 50,000 $ 50,000to 100,000 More than $ 100,000 a. Suppose one family is randomly selected from these 500 families. Find the probability that this family has a yearly income of less than $ 50,000. P(income is less than $ 50,000) =- b. Suppose one family is randomly selected from these 500 families. Find the probability that this family has a yearly income of more than $ 100,000. P(income is more than $ 100,000) = 25 : 000 F4 , F5 FS F1o FV F1n F7 F8 F2

Explanation / Answer

a.P(income less than $50000)=0.18

b. P(income is more than $100000)=0.46

Income Frequency Relative frequency f/Sumf Less than $50000 90 0.18 $50000 to $100000 180 0.36 More than $100000 230 0.46 500 1

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