# Question

Elliptical trainers are becoming one of the more popular exercise machines. Their smooth and steady low-impact motion makes them a preferred choice for individuals with knee and ankle problems. But selecting the right trainer can be a difficult process. Price and quality are two important factors in any purchase decision. Are higher prices generally associated with higher quality elliptical trainers? Consumer Reports conducted extensive tests to develop an overall rating based on ease of use, ergonomics, construction, and exercise range. The following data show the price and rating for eight elliptical trainers tested (Consumer Reports, February 2008).

a. Develop a scatter diagram with price as the independent variable.

b. An exercise equipment store that sells primarily higher priced equipment has a sign over the display area that says "Quality: You Get What You Pay For." Based upon your analysis of the data for ellipical trainers, do you think this sign fairly reflects the pricequality relationship for elliptical trainers?

c. Use the least squares method to develop the estimated regression equation.

d. Use the estimated regression equation to predict the rating for an ellipitical trainer with a price of $1500.

a. Develop a scatter diagram with price as the independent variable.

b. An exercise equipment store that sells primarily higher priced equipment has a sign over the display area that says "Quality: You Get What You Pay For." Based upon your analysis of the data for ellipical trainers, do you think this sign fairly reflects the pricequality relationship for elliptical trainers?

c. Use the least squares method to develop the estimated regression equation.

d. Use the estimated regression equation to predict the rating for an ellipitical trainer with a price of $1500.

## Answer to relevant Questions

Consider the following data for two variables, x and y. a. Compute the standardized residuals for these data. Do the data include any outliers? Explain. b. Plot the standardized residuals against y-bar. Does this plot reveal ...What is the purpose of testing whether β1 = 0? If we reject β1 = 0, does it imply a good fit? The Australian Public Service Commission's State of the Service Report 2002-2003 reported job satisfaction ratings for employees. One of the survey questions asked employees to choose the five most important workplace ...Refer to the data in exercise 2. The estimated regression equation for those data is y-bar = – 1 8.4 + 2.01x1 + 4.74x2 a. Develop a 95% confidence interval for the mean value of y when x1 = 45 and x2 = 15. b. Develop a ...In Table 15.12 we provided estimates of the probability using the coupon in the Simmons Stores catalog promotion. A different value is obtained for each combination of values for the independent variables. a. Compute the ...Post your question

0