Statistics - Cumulative Frequency

Statistics – Cumulative Frequency

Cumulative frequency is outlined as a operating whole of frequencies. The frequency of a component in a set refers to what number of of that component there are within the set. Cumulative frequency may also outlined because the sum of all earlier frequencies as much as the present level.

Instance

Drawback Assertion:

The set of information under reveals the ages of contributors in a sure winter camp. Draw a cumulative frequency desk for the info.

Age (years) Frequency
10 3
11 18
12 13
13 12
14 7
15 27

Answer:

The cumulative frequency at a sure level is discovered by including the frequency at present level to the cumulative frequency of the earlier level. The cumulative frequency for the primary knowledge level is similar as its frequency since there is no such thing as a cumulative frequency earlier than it.

Age (years) Frequency Cumulative Frequency
10 3 3
11 18 3 + 18 = 21
12 13 21 + 13 = 34
13 12 34 + 12 = 46
14 7 46 + 7 = 53
15 27 53 + 27 = 80