CBSE Class 10-Mathematics: Chapter –14 Statistics Part 13

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Question 6:

Find the median of the following frequency distribution:

Find the median of the following frequency distribution

Wages (in Rs.)

No. of Labourer

Answer:

We have

Frequency distribution

Wages (in Rs.)

No. of labourer (f)

C.F

200-300

3

3

300-400

5

8

400-500

20

28

500-600

10

38

600-700

6

44

Now and this lies in class.

Median class

Here,

We know that

Question 7:

The following tables gives production yield per hectare of wheat of farms of village:

The following tables gives production yield per hectare

Production yield

No. of farms

2

8

12

24

38

16

Change the distribution to a more than type distribution and draw its O give.

Answer:

More than type O give

More than type O give

Production yield (Kg/ha)

C.F

More than or equal to 50

More than or equal to 55

More than or equal to 60

More than or equal to 65

More than or equal to 70

More than or equal to 75

Now, draw the O given by plotting the points

Plotting the points

Plotting the Points

Loading image

Question 8:

The A.M of the following distribution is . Determine the value of P.

The A.M of the following distribution

Classes

Frequency

Answer:

We have

Determine the value of P

Class Interval

Mid-value

Frequency

0-20

10

8

80

20-40

30

15

450

40-60

50

20

1000

60-80

70

P

70P

80-100

90

5

450

Since Mean,

Thus,