Find the mean of each of the following frequency distributions: (5 - 14) Class interval 0 - 6 6 - 12 12 - 18 18 - 24 24 - 30 Frequency 6 8 10 9 7

Let a assume mean be 15 Class interval Mid-value(x1) d1 = x1 - 15 `"u"_1=(x_1-15)/6` f1 f1u1 0 - 6 3 -12 -2 6 -12 6 - 12 9 -6 -1 2 -8 12 - 18 15 0 0 10 0 18 - 24 21 6 1 9 9 24 - 30 27 12 2 7 14 N = 40 `sumf_1"u"_1=3` A = 15, h = 5 Mean `=A = hxx(sumf_1"u"_1)/N` `=15+6xx3/40` `= 15 + 18/40` = 15 + 0.45 = 15.45

Find the Mean of Each of the Following Frequency Distributions: (5 - 14) - Mathematics

Find the mean of each of the following frequency distributions: (5 - 14)

Class interval	0 - 6	6 - 12	12 - 18	18 - 24	24 - 30
Frequency	6	8	10	9	7

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Solution

Let a assume mean be 15

Class interval	Mid-value(x₁)	d₁ = x₁ - 15	`"u"_1=(x_1-15)/6`	f₁	f₁u₁
0 - 6	3	-12	-2	6	-12
6 - 12	9	-6	-1	2	-8
12 - 18	15	0	0	10	0
18 - 24	21	6	1	9	9
24 - 30	27	12	2	7	14
				N = 40	`sumf_1"u"_1=3`