Question

3 fill in the blank 1 point class frequency, f 1 - 5 21 6 - 10 16 11 - 15 28 16 - 20 13 for the frequency table above, the... cumulative frequency of the 1st class is 21 cumulative frequency of the 2nd class is 37 cumulative frequency of the 3rd class is 65 cumulative frequency of the 4th class is 78

Explanation:

Step1: Define cumulative frequency

Cumulative frequency of first - class is its own frequency.

Step2: Calculate cumulative frequency of 2nd class

Add frequency of 1st and 2nd class: $21 + 16=37$.

Step3: Calculate cumulative frequency of 3rd class

Add cumulative frequency of 2nd class and frequency of 3rd class: $37+28 = 65$.

Step4: Calculate cumulative frequency of 4th class

Add cumulative frequency of 3rd class and frequency of 4th class: $65 + 13=78$.

Answer:

Cumulative frequency of 1st class: 21
Cumulative frequency of 2nd class: 37
Cumulative frequency of 3rd class: 65
Cumulative frequency of 4th class: 78