Question
The frequency distribution below shows the length of some steel rods measured in millimetres. length (mm) number of steels 20-39 7 40-59 13 60-79 6
The frequency distribution below shows the length of some steel rods measured in millimetres.
| length (mm) | number of steels |
| 20-39 | 7 |
| 40-59 | 13 |
| 60-79 | 6 |
| 80-99 | 19 |
| 100-119 | 5 |
A. Calculate an estimate for the: i. mean length of the steels. ii. median length of the steels. iii. modal length of the steels.
B. Determine the: i. variance. ii. standard deviation.
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Physics For Scientists And Engineers
Authors: Raymond A Serway, John W Jewett
10th Edition
1337671711, 9781337671712
