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Statistics

Week 1 (Chapter 1 & 2)

Chapter 1

2. a) Ratio b) Nominal c) Interval d) Ordinal

4. a) Sample b) Population c) Population d) Sample

6. A sample is a portion or part of the population of interest. While population is the entire set of individuals or objects of interest or the measurements obtained from all individuals or object of interest.

8. a) Population would be used to get the overall average grade for the course. b) Sample would be used because a large corporation over the past ten years would be way to information to locate and take way too long. c) Sample of each because of the amount of information you are giving you don’t have to go into deep detail on each one. d) Population to get exact number to make sure it all can be stored on the iPod.

10. Name: Nominal Number of mins used: Ratio Satisfaction: Ordinal

Chapter 2

2. 3 Classes. iPod, iRiver and Magic Star MP3

8. 26=64 therefore 6 classes. i > $29 - $0 / 6 = 4.8 class intervals of 5

12. a) 5 classes b) 10 intervals c) 50 d) Chart below e) Chart below

# of Visits | Frequency | Relative Frequency | 50 -60 | 4 | 4/20=.2 | 61 -70 | 6 | 6/20=.3 | 71 - 80 | 5 | 5/20=.25 | 81 - 90 | 2 | 2/20=.1 | 91- 100 | 3 | 3/20=.15 | Total | 20 | |

16. a) 5 patients b) 20-30 Days c) 30 Days d) 3 e) Frequency Polygon

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