How to compute for the 1.  ∑x2   2.  ∑ y2 3. ∑xy of this data set for linear regression?

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter11: Data Analysis And Displays
Section: Chapter Questions
Problem 10CR
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How to compute for the

1.  ∑x2  

2.  ∑ y2

3. ∑xy

of this data set for linear regression?

Mean
Sum
Sum of squares of x
grade-point average y
1.93
2.55
1.72
2.48
2.87
1.87
1.34
3.03
2.54
2.34
1.4
1.45
1.72
3.8
2.13
1.81
2.33
2.53
2.04
3.2
2.254
45.08
decile rank x
3
2
1
1
1
3
4
1
2
2
00
8
4
8
1
5
LO
6
1
1
2
2
2.9
58
Transcribed Image Text:Mean Sum Sum of squares of x grade-point average y 1.93 2.55 1.72 2.48 2.87 1.87 1.34 3.03 2.54 2.34 1.4 1.45 1.72 3.8 2.13 1.81 2.33 2.53 2.04 3.2 2.254 45.08 decile rank x 3 2 1 1 1 3 4 1 2 2 00 8 4 8 1 5 LO 6 1 1 2 2 2.9 58
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