Darts and the DJIA. The following table contains a random sample of eight days from the Chapter 3 Case Study data set, indicating the stock market gain or loss for the portfolio chosen by the random darts, as well as the DJIA gain or loss for that day. Use this information for Exercises 43 and 44.
Question 3.157
dartsdjia
44. Calculate the following measures of spread for the DJIA:
- Range
- Sample variance
- Sample standard deviation
| Darts | DJIA |
|---|---|
| −27.4 | −12.8 |
| 18.7 | 9.3 |
| 42.2 | 8 |
| −16.3 | −8.5 |
| 11.2 | 15.8 |
| 28.5 | 10.6 |
| 1.8 | 11.5 |
| 16.9 | −5.3 |
Table 3.56: Source: Wall Street Journal.