Question

The number of Science and Mathematics projects submitted by Model high school, Nandpur in last 20 years at the state level science exibition is:
2, 3, 4, 1, 2, 3, 1, 5, 4, 2, 3, 1, 3, 5, 4, 3, 2, 2, 3, 2. Prepare a frequency table and find the mean of the data.

Answer 1

The frequency table of the data is as follows:

Number of projects `bb((x_i))`	Frequency `bb((f_i))`	`bb(f_ix_i)`
1	3	1 x 3 = 3
2	6	2 x 6 = 12
3	6	3 x 6 = 18
4	3	4 x 3 = 12
5	2	5 x 2 = 10
	∑f = 20	`sum f_ix_i` = 55

Since the mean of the data = `(sum f_ix_i)/(sumf)"`

`= 55/20`

= 2.75

Hence, the mean of the data is 2.75.