# Median formula for grouped data?

**Simple answer:**

Divide the total number of observations (plus 1, if small) by 2 to find the middle rank.

Look at the cumulative frequencies for the grouped data and find the group in which the middle rank would appear. That is the median group.

**More sophisticated answer:**

Withing the median group, interpolate.

**Simple answer:**

Divide the total number of observations (plus 1, if small) by 2 to find the middle rank.

Look at the cumulative frequencies for the grouped data and find the group in which the middle rank would appear. That is the median group.

**More sophisticated answer:**

Withing the median group, interpolate.