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Exercise 14.1

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Exercise 14.1

Posted by Mohi Soni 4 years, 8 months ago

CBSE > Class 10 > Mathematics

2 answers

Gaurav Seth 4 years, 8 months ago

In order to find the mean value, we will use direct method because the numerical value of f_i and x_i are small.

Find the midpoint of the given interval using the formula.

Midpoint (x_i) = (upper limit + lower limit)/2

No. of plants (Class interval)	No. of houses Frequency (f_i)	Mid-point (x_i)	f_ix_i
0-2	1	1	1
2-4	2	3	6
4-6	1	5	5
6-8	5	7	35
8-10	6	9	54
10-12	2	11	22
12-14	3	13	39
	Sum f_i= 20		Sum f_ix_i = 162

The formula to find the mean is:

Mean = x̄ = ∑f_ix_i /∑f_i

= 162/20

= 8.1

Therefore, the mean number of plants per house is 8.1

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Mohi Soni 4 years, 8 months ago

In e

ANSWER

http://mycbseguide.com/examin8/

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