Question

How do you find the cumulative relative frequency?

Answer 1

Step 1: How do you find the cumulative relative frequency

The relative frequency: Relative frequency can be found by dividing the frequency of each interval by the total number of observations.

The cumulative relative frequency: To find the cumulative relative frequencies, add all the previous relative frequencies to the relative frequency for the current row.

Step 2: Illustrate with an example.

Here $20$ is the sum of frequencies.

Data Value	Frequency	Relative Frequency	Cumulative Relative Frequency
$2$	$3$	$\frac{3}{20}=0.15$	$0.15$
$3$	$5$	$\frac{5}{20}=0.25$	$0.15+0.25=0.40$
$4$	$3$	$\frac{3}{20}=0.15$	$0.40+0.15=0.55$
$5$	$6$	$\frac{6}{20}=0.30$	$0.55+0.30=0.85$
$6$	$2$	$\frac{2}{20}=0.10$	$0.85+0.10=0.95$
$7$	$1$	$\frac{1}{20}=0.05$	$0.95+0.5=1.0$

Frequency Table of Student Work Hours w/ Relative and Cumulative Relative Frequency