2. Suppose that a least squares regression line equation is y = 1.65 2.20x and the actual y value corresponding to x = 10 is 19 What is the residual value corresponding to y = 19? a. 1.35 b. 1.35 c. 2.10 d. 2.10 e. none of these 3. The equation of the least squares regression line for a set of given points is y = 1.30 + 0.73x. What is the residual for the point (4, 7)? a. 2.41 b. 2.41 c. 2.78 d. 2.78 e. none of these 4. A prediction of the world's population in the year 2088 is an example of _________. a. An outlier b. Seasonality c. Extrapolation d. Correlation e. none of these 5. An observation that causes the values of the slope and the intercept in the line of best fit to be considerably different from what they would be if the observation were removed from the data set is said to be a. A causation variable b. A common response c. Extrapolation d. Influential e. A residual 1 In the Mosaic data set CoolingWater, water was poured into a mug and a temperature probe inserted into the water with a few seconds of the pour. The time in minutes, time, and the temperature in Celsius, temp, were recorded. 6. Find the equation of the LSRL for this data. a. y = 64.27 0.22x b. y = 64.27 + 0.22x c. y = 255.66 3.60x d. y = 3.60 + 0.22x e. none of these 7. Plot the residuals for the CoolingWater data. What does the pattern of the residuals tell you about the linear model? a. The evidence is inconclusive. b. The residual plot confirms the linearity of the model. c. The residual plot does not confirm the linearity of the model. d. The residual plot clearly contradicts the linearity of the model. e. none of these Use the variables temp (average outdoor temperature in F for a billing cycle) and kwh (the electricity usage for a billing cycle) from the data set called Utilities (from Mosaic data) for problems 8-11. 8. Which variable should be the explanatory variable? a. temp b. kwh 9. What is the value or the coefficient of determination? a. -0.0798778 b. 0.0063805 c. 0.9201222 d. 0.0798778 e. none of these Use the following information to answer questions 13 - 15: The following two-way table describes the preferences in music genre and ice-cream flavors for a random sample of 100 people. Vanilla Chocolate Strawberry Pop 20 5 10 Country 8 15 12 Rock 15 2 13 13. What percent of the sample likes rock music? a. 35% b. 43% c. 30% d. 22% e. none of these 14. What percent of vanilla lovers like country music? a. 18.6% b. 68.2% c. 22.7% d. 28.6% e. none of these 15. What percent of people from this survey like both pop music and chocolate ice-cream? a. 5% b. 35% c. 22% d. 63% e. none of these 4