Zagat restaurant guides publish ratings of restaurants for many large cities aro
ID: 3322768 • Letter: Z
Question
Zagat restaurant guides publish ratings of restaurants for many large cities around the world. The restaurants are rated on a 0 to 30 point scale based on quality of food, decor, service, and cost. Suppose the regression equation that predicts the cost of dinner using the rating of the quality of food for the restaurants in a particular city is (cost of dinner) = 3.884*(food quality) + 2.107. If a restaurant in the city was given a Zagat rating of 19.999, and the average cost of dinner there is 187.843, the residual is 108.06. Interpret the residual. Question 24 options: 1) The cost of dinner is 108.06 dollars larger than than what we would expect. 2) The cost of dinner is 108.06 dollars less than than what we would expect. 3) The Zagat rating is 108.06 points larger than than what we would expect. 4) The cost of dinner is 187.843 dollars larger than than what we would expect. 5) The Zagat rating is 108.06 points less than than what we would expect.
Explanation / Answer
Residual is positive and is equal to 108.06. Hence,
The cost of dinner is 108.06 dollars larger than than what we would expect.
Option 1 is correct.
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