The correlation between a family's weekly income and the amount ...

[Mimi]

Question 1

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?
◦ 70
◦ 7
◦ 700
◦ 0.70
◦ 7000

Question 2

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.
◦ I, II, and III
◦ III only
◦ II and III only
◦ I only
◦ II only

[Bigfoot1984]

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[Mimi]

Thanks for the timely response, appreciate it

[bulacsom]

Gracias!