# Question: The following information is obtained for a sample of 80

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.

**View Solution:**## Answer to relevant Questions

Refer to Exercise 13.25. The data on ages (in years) and prices (in hundreds of dollars) for eight cars of a specific model are reproduced from that exercise. a. Construct a 95% confidence interval for B. You can use results ...The following table, reproduced from Exercise 13.28, lists the percentages of space for eight magazines that contain advertisements and the prices of these magazines. a. Construct a 98% confidence interval for B. You can use ...A population data set produced the following information. N = 460, ∑x = 3920, ∑y = 2650, ∑xy = 26,570 ∑x2 = 48,530, and ∑y2 = 39,347 Find the linear correlation coefficient p. The following table, reproduced from Exercises 13.38 and 13.57, gives information on the calorie count and grams of fat for 11 types of bagels produced by Panera Bread. a. Find the correlation coefficient. Is the sign of the ...Briefly explain the difference between estimating the mean value of y and predicting a particular value of y using a regression model.Post your question