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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

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Chapter
Section
BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

Calculate SP (the sum of products of deviations) for the following scores. Note: Both means are whole numbers, so the definitional formula works well.

X Y
0 2
1 4
4 5
3 3
7 6

To determine

To calculate: The sum of products of deviations (SP).

Explanation

Given info:

The given scores are:

X Y
0 2
1 4
4 5
3 3
7 6

Calculation:

The sum of products of deviations is calculated as:

SP=(XMx)×(YMy)

Where X and Y are scores, Mxis the mean of X scores and My is the mean of Y scores. Let dx as (X Mx) and dy as (Y My), so the sum of products of deviations is calculated as:

SP=(dx)×

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