Unit 3 Two Variable Stats Review

Which value of r shows the strongest correlation?

• 0.12

• -0.12

• 0.95

• -0.90

The equation of the line in the given graph is

y = 0.467x + 0.417

Which choice is the best interpretation of the slope?

• For every additional minute the distance increases 0.417

• For every additional mile the minutes increase 0.467

• For every additional minute the distance decreases 0.467

• For every additional minute the distance increases 0.467

Based on the graph estimate how far you drive in 20 minutes.

• 20 miles

• 0 miles

• 9 miles

• 5 miles

Based on the graph estimate how long it would take you to drive 30 miles.

• 60 minutes

• 45 minutes

• 80 minutes

• 15 minutes

Based on the graph, the equation for the line of best fit is

y = -1.62x + 18

What is the best interpretation of the slope?

• For every additional staff member the wait time increased 1.62 minutes

• For every additional staff member the wait time decreased 1.62 minutes

• For every additional staff member the wait time increased 18 minutes

• For every additional staff member the wait time decreased 18 minutes

Based on the table how many student surveyed wore a helmet and were between the ages of 6-10?

• 14

• 48

• 34

• 15

Based on the table, how many students surveyed were between the ages of 15-20?

• 25

• 48

• 32

• 15

Based on the table, how many students that did not wear a helmet were between the ages of 0-5?

• 25

• 4

• 21

• 12

Based on the table how many people surveyed were apart of treatment 1?

• 40

• 60

• 48

• 52

Based on the table, of the people that were apart of treatment 1, what percentage of them had improved health?

• 57.5%

• 42.5%

• 41.6%

• 58.4%