A study of obesity risk in children in a head start program used a food score calculated from a 45-question food survey to predict body mass index (BMI) percentile in these children 18 months after the initial survey. The study enrolled 20 children. The researchers used a linear regression model for the prediction of BMI percentile. The food scores ranged from 45 to 245. Which feature, supported by the scatterplot, is important to determine if a linear regression model can be used?
A)scatter of points around a straight line
B)even spread at each value of food score
C)correlation between BMI percentiles for subjects with similar food scores
D)options (a)and (b)only

Question

A study of obesity risk in children in a head start program used a food score calculated from a 45-question food survey to predict body mass index (BMI) percentile in these children 18 months after the initial survey. The study enrolled 20 children. The researchers used a linear regression model for the prediction of BMI percentile. The food scores ranged from 45 to 245.  Which feature, supported by the scatterplot, is important to determine if a linear regression model can be used?
A)scatter of points around a straight line 
B)even spread at each value of food score 
C)correlation between BMI percentiles for subjects with similar food scores 
D)options (a)and (b)only

Quizplus · Accepted Answer

The Answer of A study of obesity risk in children in a head start program used a food score calculated from a 45-question food survey to predict body mass index (BMI) percentile in these children 18 months after the initial survey. The study enrolled 20 children. The researchers used a linear regression model for the prediction of BMI percentile. The food scores ranged from 45 to 245.  Which feature, supported by the scatterplot, is important to determine if a linear regression model can be used?
A)scatter of points around a straight line 
B)even spread at each value of food score 
C)correlation between BMI percentiles for subjects with similar food scores 
D)options (a)and (b)only

A Study of Obesity Risk in Children in a Head