Calculate the mean and standard deviation for the following data:
| 0-10 | 7 |
| 10 — 20 | 8 |
| 20 — 30 | 10 |
| 30 — 40 | 36 |
| 40 — 50 | 12 |
| 50 — 60 | 17 |
| 60 — 70 | 10 |
To calculate the mean and standard deviation for the given data, we need to follow these steps:
Step 1: Construct a frequency distribution table with class intervals, frequencies, and class marks.
Class Interval | Frequency (f) | Class Mark (x)
0 - 10 | 7 | 5
10 - 20 | 8 | 15
20 - 30 | 10 | 25
30 - 40 | 36 | 35
40 - 50 | 12 | 45
50 - 60 | 17 | 55
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