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Relative Dispersion & Probability

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Part A)
What is the relative dispersion for each group?
Explain the relative dispersion difference between the two?

Mean StdDev
Group 1 78 15
Group 2 47 10

Group 1 - Trashcan wt in rural area
Group 2 - Trashcan wt in city

NOTE: Both samples taken from large group.

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Part B)
One of the trash cans contained the following items:

Garbage 10 lbs
Paper 5 lbs
Plastic 3 lbs
Boxes 6 lbs
Misc. 10 lbs

For any given sample if even distributed:
a. The probability that the sample is boxes?
b. The above estimate was based on which probability concept?

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Solution attaches a .doc file showing how to calculate the relative dispersion between two groups and the probability that trashcans from those groups contain specific items.

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Statistics Fundamentals II - Chapter 6 ex. 5

Part A)
What is the relative dispersion for each group?

Solution:
The Dispersion is nothing but the spread of the random variable. Dispersion based on standard deviation is,
For Group 1
= = = 0.1923
For Group 2
= = = 0.2127

Explain the relative dispersion difference ...

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