# Question: How s your mileage Weight in tons and fuel economy in

How's your mileage? Weight (in tons) and fuel economy (in mpg) were measured for a sample of seven diesel trucks. The results are presented in the following table.

a. Compute the least-squares regression line for predicting mileage (y) from weight (x).

b. Construct a 95% confidence interval for the slope.

c. Test Ho: β1 = 0 versus HI: β < 0. Can you conclude that weight is useful in predicting mileage? Use the α = 0.05 level of significance.

a. Compute the least-squares regression line for predicting mileage (y) from weight (x).

b. Construct a 95% confidence interval for the slope.

c. Test Ho: β1 = 0 versus HI: β < 0. Can you conclude that weight is useful in predicting mileage? Use the α = 0.05 level of significance.

## Relevant Questions

The following MINITAB output presents the results of a test of the null hypothesis Ho: A = 0. a. What are the slope and intercept of the least-squares regression line? b. Can you conclude that x is useful for predicting y? ...How's your mileage? Use the data in Exercise I for the following. a. Compute a point estimate for the mean mileage for trucks that weigh 20 tons. b. Construct a 95% confidence interval for the mean mileage of trucks that ...The following 11-84 Plus display presents the results of a test of the null hypothesis Ho: β1 = 0. a. What is the alternate hypothesis? b. What is the value of the test statistic? c. How many degrees of freedom are ...Soil quality: Soil scientists conducted an experiment in which the mineral gypsum was added in four different amounts to soil specimens to try to control the acid level of the soil. Three soil specimens received each amount ...Earth scientists measured several chemical properties in water samples taken from wells at three locations. Following are sample means, standard deviations, and sample sizes for pH measurements. a. What are the sample sizes ...Post your question