A Study of Obesity Risk in Children in a Head

Multiple Choice

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. The residual plot below was obtained by the researchers. The plot does not show any obvious model violations because:

A) there is no pattern in the plot.
B) the residuals are spread evenly around the horizontal line through zero.
C) there are no obvious outliers.
D) All of the answer options are correct.