In a study of the relationship between marble ownership and household income, the Grinch interviewed a simple random sample of 160 Who-Households, and generated the following summary statistics: x = 4.2 Sx = 0.7 ỹ = 15.6 Sy = 2.8 rxy = 0.825 where = 'x monthly income of the ith household, measured in $1000s. Yi = weight of marbles owned by ith household, measured in Ibs. Using these statistics to find the regression equation for predicting marble weight from income, the estimated mean weight of marbles owned by all Who-households with monthly incomes of $3000

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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In a study of the relationship between marble ownership and household income, the Grinch
interviewed a simple random sample of 160 Who-Households, and generated the following summary
statistics:
x = 4.2
Sx = 0.7
ỹ = 15.6
Sy = 2.8
Ixy = 0.825
where
Xi =
monthly income of the ith household, measured in $1000s.
Yi =
weight of marbles owned by ith household, measured in Ibs .
Using these statistics to find the regression equation for predicting marble weight from income, the
estimated mean weight of marbles owned by all Who-households with monthly incomes of $3000
is..
O= 13.28 lbs
O 11.64 lbs
= 9.9 Ibs
= 8.7 Ibs
Transcribed Image Text:In a study of the relationship between marble ownership and household income, the Grinch interviewed a simple random sample of 160 Who-Households, and generated the following summary statistics: x = 4.2 Sx = 0.7 ỹ = 15.6 Sy = 2.8 Ixy = 0.825 where Xi = monthly income of the ith household, measured in $1000s. Yi = weight of marbles owned by ith household, measured in Ibs . Using these statistics to find the regression equation for predicting marble weight from income, the estimated mean weight of marbles owned by all Who-households with monthly incomes of $3000 is.. O= 13.28 lbs O 11.64 lbs = 9.9 Ibs = 8.7 Ibs
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