Question

The data below shows age (x, in years) and weekly entertainment expenses (y, in dollars) for a random sample of ten adults. The least squares regression model for this data is yˆ=344.07 − 4.21x.y^=344.07 − 4.21x. Select all valid statements regarding the use of this regression model.

You must make a selection for each option. Click once to place a check mark for correct answers and click twice to place an "x" for the wrong answers.

• It is appropriate to use this model to predict average weekly entertainment expenses for a 53-year-old adult.unanswered
• It is appropriate to use this model to predict average weekly entertainment expenses for a 36-year-old adult.unanswered
• It is appropriate to use this model to predict average weekly entertainment expenses for a 19-year-old adult.unanswered
• It is appropriate to use this model to predict average weekly entertainment expenses for a 65-year-old adult.unanswered

Age	Entertainment expenses
21	242
23	265
27	275
30	192
33	215
42	98
45	164
47	128
55	159
61	85

Answer 1

y^=344.07 − 4.21x

as the model contain the values of 53 and 36 but not 19 and 65.

• It is appropriate to use this model to predict average weekly entertainment expenses for a 53-year-old adult. True
• It is appropriate to use this model to predict average weekly entertainment expenses for a 36-year-old adult. True
• It is appropriate to use this model to predict average weekly entertainment expenses for a 19-year-old adult. False
• It is appropriate to use this model to predict average weekly entertainment expenses for a 65-year-old adult. False