Which of the following is a 95% confidence interval for the population slope 1 ? a.

Which of the following is a 95% confidence interval for the population slope β₁?

a. 3.0867 ± 0.4117

b. 3.0867 ± 0.8518

c. 3.0867 ± 0.8069

d. 3.0867 ± 0.8497

e. 3.0867 ± 0.8481

To see if students with longer feet tend to be taller, a random sample of 25 students was selected from a large high school. For each student, x = foot length (cm) and y = height (cm) were recorded. We checked that the conditions for inference about the slope of the population regression line are met. Here is a portion of the computer output from a least-squares regression analysis using these data:

Transcribed Image Text:

Predictor Coef SE Coef P Constant 91.9766 10.2204 8.999 0.000 Foot length 3.0867 0.4117 7.498 0.000 S= 6.47044 R-Sq = 72.8% R-Sq(adj)= 71.5%