Mean, median, mode, and standard deviation (STD) 2. Data type: discrete or continuous 3. True class limits and true class marks 4. Frequency and cumulative frequency
| 9 | 5 | 12 | 11 | 10 |
| 11 | 10 | 11 | 14 | 8 |
| 6 | 7 | 9 | 7 | 11 |
| 12 | 12 | 6 | 7 | 13 |
| 8 | 8 | 9 | 10 | 9 |
The following values of Young’s Modulus for a rubber
compound (in 1000 lb/in2) have been measured. The class
boundaries are 4-6, 6-8, etc., and the upper boundary is the
inclusive bound (e.g., 4-6 means 4<x<=6). Determine the
followings:
1. Mean,
2. Data type: discrete or continuous
3. True class limits and true class marks
4. Frequency and cumulative frequency
Draw the followings:
5. Frequency distribution chart
6. Histogram and cumulative frequency chart
Calculate the following:
7. Mean and STD using the frequency distribution chart
Consider the data in the first three columns are the sample. Calculate the following:
8. Mean and STD
Discuss the followings:
9. Any possible difference between using all of the data to calculate the
vs. obtaining it from the histogram
10. Whether the collected data (in problem 8) represent the entire population well or not.
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