# Question

1. In a scatterplot, the response is shown on the horizontal axis with the explanatory variable on the vertical axis.

2. Regression analysis requires several values of the response for each value of the predictor so that we can calculate averages for each x.

3. If all of the data lie along a single line with nonzero slope, then the r2 of the regression is 1. (Assume the values of the explanatory variable are not identical.)

4. If the correlation between the explanatory variable and the response is zero, then the slope will also be zero.

5. The use of a linear equation to describe the association between price and sales implies that we expect equal differences in sales when comparing periods with prices $10 and $11 and periods with prices $20 and $21.

6. The linear equation (estimated from a sequence of daily observations) Estimated Shipments = b0 + 0.9 Orders Processed

2. Regression analysis requires several values of the response for each value of the predictor so that we can calculate averages for each x.

3. If all of the data lie along a single line with nonzero slope, then the r2 of the regression is 1. (Assume the values of the explanatory variable are not identical.)

4. If the correlation between the explanatory variable and the response is zero, then the slope will also be zero.

5. The use of a linear equation to describe the association between price and sales implies that we expect equal differences in sales when comparing periods with prices $10 and $11 and periods with prices $20 and $21.

6. The linear equation (estimated from a sequence of daily observations) Estimated Shipments = b0 + 0.9 Orders Processed

## Answer to relevant Questions

1. The intercept estimates how much the response changes on average with changes in the predictor. 2. The estimated value ŷ = b0 + b1 x approximates the average value of the response when the explanatory variable equals ...An assembly plant tracks the daily productivity of the workers on the line. Each day, for every employee, the plant records the number of hours put in (Hours) and the number of completed packages assembled by the employee ...This data file contains a variety of accounting and financial values that describe 493 companies operating in several technology industries in 2004: software, systems design, and semiconductor manufacturing. One column gives ...1. Regression equations only represent linear trends in data. 2. If the correlation between X and Y is larger than 0.5, then a linear equation is appropriate to describe the association. 3. To identify the presence of ...Cellular (or mobile) phones are everywhere these days, but it has not always been so. These data from CTIA, an organization representing the wireless communications industry, track the number of cellular subscribers in the ...Post your question

0