Relative frequency and cumulative frequency for the given data
Consider the following frequency distribution based on a set of sample data:
X

0

1

2

4

4

5




f

8

18

12

11

5

1




a) What is the sample size?
b) What is the relative frequency of X=4?
c) Is the above "a grouped data" kind?
d) Generate the cumulative frequencies.
e) Find out the mode and P_{50.}