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 least-squares estimate for the slope was 0.29 with standard error SE = 0.046. The t statistic for the hypothesis H₀:  = 0 is given by:

A) 1.96.
B) 6.3.
C) 2.39.
D) 4.62.