Question

The age in years and the number of hours of sleep in one night for seven...

The age in years and the number of hours of sleep in one night for seven adults.

Age,x 35,20,59,42,68,38,75

Hrs of sleep,y 7,9,5,6,5,8,4

1. Use excel to do a scatter plot. Remember your title and axis titles.

2. Caculate the correlation coefficient r using excel

3. What is R to the power of 2?

4. calculate the slope,m, of the regression line using excel

5. calculate the y intercept,b, of vthe regression line using excel

6. write the regression line using the answer from problems 4 and 5. Y=mx+b

7. Given the regression line y=2.3x-4, predict y for x=10

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