hw3_skeleton

3.1

• 4. The mean would be larger, because it is more susceptible to extreme observaions.
• 5. The median is located between 5,000 and 5,001.
• 6. False, a dataset could have no mode, one, more than one mode.
• 7. Sample mean = 11
• 8. Samples mean = 82
• 9. Population mean = 9
• 10. Population mean = 15
• 11. The mean price per ticket was $2,646.
• 12. The missing value is 32.

3.2

• 1. The sum of the deviations about the mean always equals 0.
• 2. The standard deviation is used in conjunction with the mean to numerically describe distributions that are bell shaped. The variance measures the center of the distribution, while the standard deviation measures the deviation of the distribution.
• 3. True
• 5. Sample variance = 36 Sample standard deviation = 6
• 6. Sample variance = 100 Sample standard deviation = 10
• 7. Population variance = 16 Population standard deviation = 4
• 8. Population variance = 32.9 Population standard deviation = 5.7

• 1. III

  2. I

  3. IV

  4. II