Explanation Formula used: “The correlation coefficient is denoted by r and is given by r = n ( ∑ x y ) − ( ∑ x ) ( ∑ y ) n ( ∑ x 2 ) − ( ∑ x ) 2 ⋅ n ( ∑ y 2 ) − ( ∑ y ) 2 .” Calculation: The number of data points is n = 6 . The values x , y , x y , x 2 , y 2 and their column totals are calculated in the below table. x y x y x 2 y 2 1 3 3 1 9 2 4 8 4 16 3 6 18 9 36 4 5 20 16 25 5 7 35 25 49 6 8 48 36 64 ∑ x = 21 ∑ y = 33 ∑ x y = 132 ∑ x 2 = 91 ∑ y 2

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ISBN: 8220102020252

Author: RITCHEY

Publisher: PEARSON

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Chapter 1.3, Problem 2YT

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To find: The correlation coefficient r.

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Chapter 1.3, Problem 1YT

Chapter 1.3, Problem 1E

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Chapter 1 Solutions

EBK FINITE MATHEMATICS AND CALCULUS WIT

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The correlation coefficient r .

Solution Summary: The author calculates the correlation coefficient r by subtracting the column totals from the formula.

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