# Question

The following information is obtained for a sample of 80 observations taken from a population.

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.

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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