Question

find the mean of the following data
Marks. 0-10 0-20 0-30 0-40 0-50
frequency 5 10 14 17 20​

Answer 1

Step-by-step explanation:

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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Answer 2

Answer:

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