5.5: Exercises
- Page ID
- 219091
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Behavioral and ecological factors influence dispersion. Uniform patterns of dispersion are generally a result of interactions between individuals like competition and territoriality.
1. In ecology a uniform distribution of an organism may result when the organism exhibits territorial behavior that keeps most organisms. In one study, a portion of a field was divided into a \(20 \times \20\) grid and a count made of the number of organisms in each unit of the grid giving the results seen below.
| number of organisms in plot | frequency |
|---|---|
| 2 | 58 |
| 3 | 51 |
| 4 | 60 |
| 5 | 64 |
| 6 | 54 |
| 7 | 52 |
| 8 | 61 |
Create a plot similar to that in 5.4.1 and comment on your results.
2. Chlorine has two isotopes, 35Cl (75.8% abundance) and 37Cl (24.2% abundance). Create a plot similar to that in Figure 5.4.2 for the molecule PCB 77, a chlorinated compound with the formula C12H6Cl4 and comment on your results.
3. A radioactive decay process has a background level of 3 emissions per minute and follows a Poisson distribution. The number of emissions per minute was monitored for one hour giving the following results
| emissions per minute | frequency of event |
|---|---|
| 0 | 3 |
| 1 | 9 |
| 2 | 13 |
| 3 | 16 |
| 4 | 9 |
| 5 | 5 |
| 6 | 3 |
| 7 | 1 |
| 8 | 1 |
| 9 | 0 |
| 10 | 0 |
Use this data to create a plot similar to that in Figure 5.4.3 and comment on your results
4. Using the penny data from Exercise 3.4.5, create a plot similar to that in Figure 5.4.4 using all pennies minted after 1982 and comment on your results.
5. Use this link to access a case study on data analysis and complete the first four investigations included in Part IV: Ways to Model Data.