Aron chpt 2

Mean ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Copyright © 2011 by Pearson Education, Inc. All rights reserved

Median ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Types of Distributions ,[object Object]

Comparing Representative Values Which measure of central tendency is most appropriate? Student Salary John $7,000 Aaron $5,000 Carrie $7,500 Maddie $2,500 Steve $750,000 Ashley $3,000 Brad $4,500 Sydney $3,000

Variability ,[object Object],[object Object],Statistics Exam Scores Classroom A Classroom B 95 80 63 82 82 81 90 83 75 79 M = 81 M = 81

Measures of Variability ,[object Object],[object Object],[object Object],[object Object]

Range ,[object Object],[object Object],[object Object],[object Object],Statistics Exam Scores Classroom A Classroom B 95 80 63 82 82 81 90 83 75 79

Potential Problems with Range ,[object Object],[object Object],[object Object],Sales Commissions Sales Representative A Sales Representative B $15,000 $14,000 $1,000 $15,000 $2,500 $1,000 $3,000 $11,500

Variance ,[object Object],[object Object],95 - 81 = 14 points 63 - 81 = -18 points 82 - 81 = 1 point 90 - 81 = 9 points 75 - 81 = -6 points 0 0/5 = 0 Classroom A 95 63 82 90 75 M = 81

Variance ,[object Object],[object Object],95 - 81 = 14 63 - 81 = -18 82 - 81 = 1 90 - 81 = 9 75 - 81 = -6

Variance ,[object Object],[object Object]

Variance ,[object Object],[object Object],Not in text

Variance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Let’s do classroom B ,[object Object],[object Object],Classroom B 80 82 81 83 79 M = 81

How Are You Doing? ,[object Object],[object Object]

Aron chpt 2

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Aron chpt 2