Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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The following data were collected during a study of consumer buying patterns:
Observation
Observation
y.
69
y.
18
19
81
2
26
81
9
14
75
41
85
10
10
76
4
35
77
11
25
83
56
95
12
21
86
46
93
13
29
90
33
86
Click here for the Excel Data File
b. Obtain a linear regression line for the data (Round your intermediote calculations and final answers to 3 decimal places.)
y3=
c. What percentage of the variation is explained by the regression line? (Do not round intermediate calculations. Round your answer
to the nearest whole percent.)
Approximately
of the varlation in the dependent varlable is explainud by the independent variable
d. Use the equation determined in part b to predict the expected value of y for x 44. (Round your intermediate calculations and
final answers to 3 decimal places.)
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Transcribed Image Text:The following data were collected during a study of consumer buying patterns: Observation Observation y. 69 y. 18 19 81 2 26 81 9 14 75 41 85 10 10 76 4 35 77 11 25 83 56 95 12 21 86 46 93 13 29 90 33 86 Click here for the Excel Data File b. Obtain a linear regression line for the data (Round your intermediote calculations and final answers to 3 decimal places.) y3= c. What percentage of the variation is explained by the regression line? (Do not round intermediate calculations. Round your answer to the nearest whole percent.) Approximately of the varlation in the dependent varlable is explainud by the independent variable d. Use the equation determined in part b to predict the expected value of y for x 44. (Round your intermediate calculations and final answers to 3 decimal places.)
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