Find the mean of the following frequency distribution, using assumed-mean method: Class 0 - 10 10 - 20 20 - 30 30 - 40 40 – 50 Frequency 7 12 13 10 8
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Answer:
27.2
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10th
Maths
Statistics
Mean of Grouped Data
Find the mean of the follow...
STATISTICS
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Asked on December 20, 2019 by
Prajwal Sonkar
Find the mean of the following data, by using the assumed mean method.
Class Interval
0−10
10−20
20−30
30−40
40−50
Frequency
7
8
12
13
10
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ANSWER
Answer:-
Class interval Frequency (f
i
) x
i
=
2
lower limit + upper limit
f
i
x
i
0−10 7 5 35
10−20 8 15 120
20−30 12 25 300
30−40 13 35 455
40−50 10 45 450
Σf
i
=50 Σf
i
x
i
=1360
Mean =
Σf
i
Σf
i
x
i
=
50
1360
=27.2
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