Question

1 / 1 Assignment – 1 1. Find the Mean for the following: Marks 0-10 10-20 20-30 30-40 40-50 No of students 20 24 40 36 20

Answer 1

Answer:

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Answer 2

Answer:

40-50

45

20

900

mean =

∑f

∑fx

=

140

3620

=25.857

Assumed mean method

size

x

u=x-25

f

uf

0-10

5

-20

20

-400

10-20

15

-10

24

-240

20-30

25

0

40

0

30-40

35

10

36

360

40-50

45

20

20

400

mean =A+

∑f

∑fu

=25+

140

120

=25.875

Step deviation method

size

x

d=x-25

u=(x-25) / 10

f

uf

0-10

5

-20

-2

20

-40

10-20

15

-10

-1

24

-24

20-30

25

0

0

40

0

30-40

35

10

1

36

36

40-50

45

20

2

20

40

mean =A+h×

∑f

∑fu

=25+10×

140

12

=25.875

Answer ByavatarToppr

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