BOARD QUESTIONS 2019-2020
(STATISTICS)
1 MARK
1. For the following frequency distribution:
|
Class
|
0-5
|
5-10
|
10-15
|
15-20
|
20-25
|
|
frequency
|
8
|
10
|
19
|
25
|
8
|
The upper limit of median class is
(a)
15
(b) 10 (c) 20 (d)
25
2. In the formula,
2 MARK
3. Find the mode of the distribution:
|
Age
(in
yrs)
|
0-10
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
|
No of
person
|
4
|
6
|
7
|
12
|
5
|
6
|
4. Find the mean for the following
distribution:
|
Class
|
5-15
|
15-25
|
25-35
|
35-45
|
|
frequency
|
2
|
4
|
3
|
2
|
5. Find the mode of the distribution:
|
Class
|
200-400
|
400-600
|
600-800
|
800-1000
|
1000-1200
|
|
frequency
|
21
|
25
|
19
|
23
|
12
|
4 MARK
6. Draw a ‘less than’ ogive for the
following frequency distribution:
|
Classes
|
0-10
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
60-70
|
70-80
|
|
frequency
|
7
|
14
|
13
|
12
|
20
|
11
|
15
|
8
|
7. Draw a ‘less than’ ogive for the
following frequency distribution and hence find the median:
|
Age
(in
yrs)
|
0-10
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
60-70
|
|
No of
person
|
5
|
15
|
20
|
25
|
15
|
11
|
9
|
8. Find the mean and median for the
following frequency distribution:
|
No of
wickets
|
20-60
|
60-100
|
100-140
|
140-180
|
180-220
|
220-260
|
|
No of bowlers
|
7
|
5
|
16
|
12
|
2
|
3
|
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