The max grade for this lab is 110 but the scale is still 100 points. The 10 points are extra credit.

In what follows, use any of the following tests/procedures: Regression, multiple regression, confidence intervals, one-sided t-test or two-sided t-test. All the procedures should be done with a 5%P-value or a 95% confidence interval.

Upload the dataHeartRate_Exercise. These data are based on 45 randomly chosen high school students.

weekly exercise (hours) Heart Rate at rest 16 55 2 76 3 78 17 46 19 76 3 68 19 61 12 68 15 48 2 71 4 72 2 81 10 64 9 61 0 73 0 84 5 72 16 58 0 77 19 54 4 79 8 73 6 85 17 57 2 75 7 85 13 73 3 75 8 84 6 52 5 60 18 69 1 66 19 90 19 64 5 65 0 74 2 55 18 67 2 78 0 71 18 76 11 76 13 84 0 91 

SETUP: It is believed that high school students who do not exercise have a heart rate (at rest) above 70. Given the data your job is to confirm or disprove this belief.

1. What test/procedure did you perform?

• a. One-sided t-test
• b. Two-sided t-test
• c. Regression
• d. Confidence interval

2. What is theP-value/margin of error?

• a. 1.56075E-45
• b. 3.1215E-45
• c. 6.149555
• d. 8.065421
• e. None of these

3. Statistical interpretation

• a. Since theP-value is very small, we are confident that the average heart rate is above 70.
• b. Since theP-value is very small, we are very confident that the averages are different.
• c. Since theP-value is very small, we are confident that the slope of regression line is not zero.
• d. We are 95% certain that the confidence interval is [70.268, 86.399].
• e. None of these

4. Conclusion

• a. Yes, I am confident that the above assertion is correct.
• b. No, we cannot claim that the above assertion is correct.