The following information is obtained for a sample of 80 observations taken from a population. SSxx =
Question:
SSxx = 380.592, se = .961, and ŷ = 160.24 – 2.70x
a. Make a 97% confidence interval for B.
b. Test at the 1% significance level whether B is negative.
c. Can you conclude that B is different from zero? Use α = .01.
d. Using a significance level of .025, test whether B is less than –1.25.
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a b 270 s b s e SS xx 961 380592 0493 n 80 is very large we use the normal distribution to approxima...View the full answer
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