hw3_skeleton

3.1

• 4. The mean will be larger because it is not resistant. It is sensitive to outlying values.
• 5. The median will be the mean of the two middle observations. If there are 10.000 values then the median will be the mean of values 5000 and 5001.
• 6. False, it can be bimodal, multimodal or have no modes at all
• 7. 11 (55/5)
• 8. 82 (410/5)
• 9. 9 (45/5)
• 10. 15 (135/9)
• 11. $2,646 ($218,469,636/82,566)
• 12. 32

3.2

• 1. 0 (zero always)
• 2. Mean, mean, dispersion
• 3. True
• 5. Sample standard deviation is 6 and the variance is 36
• 6. Sample standard deviation is 10 and the variance is 100
• 7. Population standard deviation is 4 and the variance is 16
• 8. Population standard deviation is 8 and the variance is 64

• 1. III

  2. I

  3. IIII

  4. II