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**A class teacher has the following absentee record of 40 students of a class for the whole**

**term. Find the mean number of days a student was absent by the direct method.**

Number of days | 0-6 | 6-10 | 10-14 | 14-20 | 20-28 | 28-38 | 38-40 |
---|---|---|---|---|---|---|---|

Number of students | 11 | 10 | 7 | 4 | 4 | 3 | 1 |

Answer:

Find the midpoint of the given interval using the formula.

Midpoint (xi) = (upper limit + lower limit)/2

The mean formula is,

Mean = x̄ = ∑f_{i}x_{i} /∑f_{i}

= 499/40

= 12.48 days

Therefore, the mean number of days a student was absent = 12.48.

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