Chapter 14: Q 6 (page 588)
Identify three statistics that can be used as a basis for testing the utility of a regression.
Slope, The sample correlation coefficient and The coefficient of determination
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In this Exercise 14.5, we repeat the information from Exercise 14.14.
a. Decide, at the significance level, whether the data provide sufficient evidence to conclude that is useful for predicting :
b. Find a confidence interval for the slope of the population regression line.
To find and interpret a confidence interval , at the specified confidence level for the slope of the population regression line that relates the response variables to the predictor variable.
What statistic is used to estimate
a. The intercept of the population regression line?
b. The slope of the population regression line?
c. The common conditional standard deviation, , of the response variable?
Gas Guzzlers. Use the data on the WeissStats site for gas mileage and engine displacement for 121 vehicles referred to in Exercise 14.41.
In this Exercise 14.54, we repeat the information from Exercise 14.18.
a. Decide, at the significance level, whether the data provide sufficient evidence to conclude that is useful for predicting :
b. Find a confidence interval for the slope of the population regression line.
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