A small sample of people were surveyed about their coffee drinking and sleeping habits. Does drinking coffee impact one’s amount of sleep?
NOTE: this data is made up for instructional purposes!

Daily Cups of Coffee Sleep (minutes)

3

400

0

480

8

310

1

300

1

390

2

360

1

410

0

500

2

390

1

480

3

360

4

430

0

450

5

240

1

420

2

380

1

480

linear regression plot of minutes of sleep compared to cups of coffee consumed. The line slopes downward from 445 to 250 through a loose cluster of points as cups increase from 0 to 8. At the top we see the equation y = -22.321x + 444.778; r-sq: 0.426

1 Describe the relationship between coffee intake and minutes of sleep shown in the data above.

2 Why is the y-axis of the display above misleading?

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