calculate the mean of the following distribution using assumed mean method class interval 0-10/10-20/30-40/40-50 and the frequency are 5,7,15,28,8
Answers
Answer:
29.285
Step-by-step explanation:
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Answer:
25.23
Step-by-step explanation:
CLASS FREQUENCY(f) Midv(m) deviation(d) f×d
0-10 5 5 -20 -100
10-20 7 15 -10 -70
20-30 15 25 = A 0 0
30-40 28 35 10 280
40-50 8 45 20 160
f=63 f×d=270
so, A is our assumed mean i.e. 25
i hope you know the formula of assumed mean.
using that formula,
25+ 63/270
=25.23