Author Question: The correlation between a family's weekly income and the amount they spend on restaurant meals is ... (Read 127 times)

mmm · **on:** Jul 25, 2018

The correlation between a family's weekly income and the amount they spend on restaurant meals is found to be r = 0.30. Which must be true?

I. Families tend to spend about 30 of their incomes in restaurants.
II. In general, the higher the income, the more the family spends in restaurants.
III. The line of best fit passes through 30 of the (income, restaurant) data points.
A) II only
B) II and III only
C) I only
D) III only
E) I, II, and III

Question 2

A consumer group collected information on HDTVs . They created a linear model to estimate the cost of an HDTV (in ) based on the screen size (in inches). Which is the most likely value of the slope of the line of best fit?

A) 70 B) 7000 C) 0.70 D) 700 E) 7