Classes | Mid ?value | |||
0-10 10-20 20-30 30-40 40-50 80-60 60-70 | 5 15 25 35 45 55 65 | 4 4 7 10 12 8 5 | -3 -2 -1 0 1 2 3 | -12 -8 -7 0 12 16 15 |
Classes | Mid value | Frequency | |
0-20 20-40 40-60 60-80 80-100 | 10 30 50 70 90 | 17 P 32 24 19 | 170 30p 1600 1680 1710 |
Answer:
Find mean of the following frequency distribution, using
step-deviation method :
OR
The mean of the following frequency distribution is 50.
Find the value of p.
Classes
0-10
10-20
20-30
30-40
40-50
50-60
60-70
Total
Frequency
4
4
7
10
12
8
5
50
Classes
0-20
20-40
40-60
60-80
80-100
Frequency
17
P
32
24
19
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