Question: Consider the weight and blood pressure data in Problem. Fit a no-intercept model to the data and compare it to the model obtained in Problem. Which model would you conclude is superior?
Problem: The weight and systolic blood pressure of 26 randomly selected males in the age group 25-30 are shown below. Assume that weight and blood pressure (BP) are jointly normally distributed.
a. Find a regression line relating systolic blood pressure to weight.
b. Estimate the correlatiou coefficient.
c. Test the hypothesis that ρ = 0.
d. Test the hypothesis that ρ = 0.6.
e. Find a 95% CI for ρ.
