EduSahara™ Worksheet

Question 1

1.

(i)

26
(ii)

25
(iii)

28
(iv)

27
(v)

23

Question 2

2.

(i)

39
(ii)

40
(iii)

35
(iv)

37
(v)

38

Question 3

3.

(i)

5
(ii)

4
(iii)

7
(iv)

3
(v)

1

Question 4

4.

(i)

95
2
(ii)

93
2
(iii)

189
4
(iv)

97
2
(v)

48

Question 5

5.

(i)

137
4
(ii)

69
2
(iii)

67
2
(iv)

71
2
(v)

35

Question 6

6.

If the upper and lower limit of class interval are 19 and 15 respectively, then the class interval is

(i)

15

-

19.5
(ii)

15.5

-

18.5
(iii)

14.5

-

19
(iv)

14.5

-

19.5
(v)

15

-

19

Question 7

7.

If the lower and upper limit of class interval are 43 and 45 respectively, then the class interval is

(i)

43

-

45
(ii)

42.5

-

45.5
(iii)

42.5

-

45
(iv)

43

-

45.5
(v)

43.5

-

44.5

Question 8

8.

The class boundaries of 36 - 40 which is in exclusive form are

(i)

35.5

-

40.5
(ii)

35.5

-

40
(iii)

36

-

40.5
(iv)

36

-

40
(v)

36.5

-

39.5

Question 9

9.

The class size used in the below table is
Class-Interval

16 - 25

25 - 34

34 - 43

43 - 52

52 - 61

61 - 70

70 - 79

79 - 88

Frequency

19

17

28

1

9

8

14

4

(i)

6
(ii)

10
(iii)

8
(iv)

9
(v)

12

Question 10

10.

In exclusive form representation, the observation
29
falls in which class?

(i)

19

-

29
(ii)

34

-

44
(iii)

39

-

49
(iv)

24

-

29
(v)

29

-

39

Question 11

11.

The class mark of the class with frequency x is

Class-Interval

Frequency

17 - 27

26

27 - 37

6

37 - 47

5

47 - 57

x

57 - 67

30

(i)

52
(ii)

54
(iii)

51
(iv)

53
(v)

50

Question 12

12.

The class boundaries of the class with frequency x is

Class-Interval

Frequency

18 - 26

20

26 - 34

7

34 - 42

x

42 - 50

26

50 - 58

5

(i)

34

-

42
(ii)

34.5

-

41.5
(iii)

33.5

-

42.5
(iv)

34

-

42.5
(v)

33.5

-

42

Question 13

13.

The true lower limit and true upper limit of the class with frequency x is

Class-Interval

Frequency

44 - 52

23

52 - 60

x

60 - 68

30

68 - 76

16

76 - 84

14

(i)

51.5

-

60
(ii)

52

-

60
(iii)

52

-

60.5
(iv)

51.5

-

60.5
(v)

52.5

-

59.5

Question 14

14.

The upper limit of the class with frequency x is

Class-Interval

Frequency

25 - 30

27

30 - 35

15

35 - 40

18

40 - 45

26

45 - 50

x

(i)

53
(ii)

51
(iii)

47
(iv)

49
(v)

50

Question 15

15.

If the sample data with range 50 has to be divided into 10 class intervals, then the length of the class is

(i)

3
(ii)

6
(iii)

8
(iv)

5
(v)

4

Question 16

16.

If the length of the class is 12, then the number of class intervals needed to represent data with range 60 is

(i)

2
(ii)

4
(iii)

8
(iv)

6
(v)

5

Question 17

17.

The number of classes of class size
10
required to represent
the given random sample in exclusive form
4

7

8

9

9

10

13

14

15

16

19

19

20

21

27

29

30

30

31

32

34

34

36

36

37

38

39

39

40

41

41

41

42

42

43

46

46

47

49

50

(i)

7
(ii)

4
(iii)

6
(iv)

2
(v)

5

Question 18

18.

If some random sample data is arranged in a frequency distribution table in
exclusive form
with
1
-
9
as the first class,
then the observation
25
falls in which class?

(i)

25.5

-

32.5
(ii)

25

-

33
(iii)

24

-

32
(iv)

26

-

34
(v)

24.5

-

33.5

Question 19

19.

Given class interval table, find the sum of frequencies.

Class-Interval

50 - 56

56 - 62

62 - 68

68 - 74

74 - 80

80 - 86

86 - 92

Frequency

7

3

14

17

19

23

4

(i)

86
(ii)

87
(iii)

88
(iv)

90
(v)

84

Question 20

20.

The class marks of a frequency distribution are
16.5 , 25.5 , 34.5 , 43.5
.

Find the class size and class intervals
in exclusive form

(i)

11

;

11

-

21

,

22

-

32

,

33

-

43

,

44

-

54
(ii)

10

;

12

-

21

,

22

-

31

,

32

-

41

,

42

-

51
(iii)

9

;

13

-

22

,

22

-

31

,

31

-

40

,

40

-

49
(iv)

9

;

11

-

20

,

20

-

29

,

29

-

38

,

38

-

47
(v)

9

;

12

-

21

,

21

-

30

,

30

-

39

,

39

-

48

Assignment Key