Question

What is modal class?

Answer 1

Answer:

When you have a set of numbers/counts, and cluster them into groups - i.e. classes - the modal class is the class with the highest frequency, i.e. the one having most “members”.

For example, say the ages of a set of people are respectively: 11, 23, 24, 25, 33, 35, 41, 52, 61, 74.

Now group them into classes, e.g. 0–10, 10–20, 20–30, 30–40, etc. getting:

0–10 0 members

10–20 1 member (11)

20–30 3 members (23, 24, 25)

30–40 2 members (33, 35)

40–50 1 member (41)

50–60 1 member (52)

60–70 1 member (61)

70–80 1 member (74)

I this case the modal class would be 20–30 having a frequency of 3.

All classes should have the same “length”, so e.g. it would be wrong to include a class 80–100.

Note that the modal class is not always defined, when several classes jointly have the highest frequency there is no unique modal class.

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