Janine is studying the relationship between the size of a diamond (in carats) and its price. She obtains size and price data for a random sample of 64 diamonds. Here is computer output from a least-squares regression analysis on her sample:
Predictor
Coef
SE Coef
T
P
Constant
8.00
60.76
0.13
0.90
Carat
2722.34
259.92
10.47
0.00
S132.30
R-sq = 63.9%
Assume that all conditions for inference have been met.
Which of these is a 95% confidence interval for the slope of the least squares regression line?
Choose 1 answer:
2722.34±1.67(259.92)
B 2722.34±1.96(259.92)
C 2722.34±2.00(259.92)
D 2722.34 + 1.67 ( 259.92 √64
E 2722.34± 2.00 259.92 √64