Q1
- If the mean of the following data is 20.6, find the value of p.
|
x:
|
10
|
15
|
p
|
25
|
35
|
|
f:
|
3
|
10
|
25
|
7
|
5
|
Q2
- If the mean of the following data is 20, find the value of p.
|
x:
|
15
|
17
|
19
|
21
|
23
|
|
f:
|
2
|
3
|
4
|
5p
|
6
|
Q3 -The
distribution below gives the weight of 30 students in a class. Find the median
weight of students.
|
Weight (in Kg.)
|
40-50
|
50-60
|
60-70
|
70-80
|
|
F
|
5
|
14
|
9
|
2
|
Q4 -If
the median of the following frequency distribution is 46. Find the missing
frequency.
|
Variable
10-20 20-30 30-40 40-50 50-60 60-70 70-80 Total
|
|
F: 12 30 P 65 q 25 18 229
|
Q5 - The
total number of marks scored by class in test is given below. Find the
mean.
|
Below
20
|
4
|
|
Below
40
|
12
|
|
Below
60
|
30
|
|
Below
80
|
44
|
|
Below
100
|
50
|
Q6 - Find
the median class of the following data:
|
Marks
Obtained
|
0-10
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
|
Frequency
|
8
|
10
|
12
|
22
|
30
|
18
|
Q7 -Find
the mean by direct methos for the following data:
|
Classes
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
60-70
|
70-80
|
|
Frequency
|
4
|
8
|
10
|
12
|
10
|
4
|
2
|
Q8
- Find the mean of following frequency distribution:
|
Class-inetrval:
|
0-10
|
10-20
|
20-30
|
30-40
|
40-50
|
|
No.
of workers:
|
7
|
10
|
15
|
8
|
10
|
Q9- If
the mean of the following distribution is 27, find the value of p:
|
Class-interval
0-10 10-20 20-30
30-40 40-50
|
|
No.
of Workers
8 p
12
13 10
|
Q10 -Find
the mean of the following frequency distributions:
|
Class-interval
0-6 6-12 12-18
18-24 24-30
|
|
No.
of Workers 6
8
10
9 7
|
Q11 -
Find the median for the following data:
|
Classes
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
60-70
|
70-80
|
|
Frequency
|
4
|
8
|
10
|
12
|
10
|
4
|
2
|
Q12- Find
the mode for the following data:
|
Classes
|
10-20
|
20-30
|
30-40
|
40-50
|
50-60
|
60-70
|
70-80
|
|
Frequency
|
4
|
8
|
10
|
12
|
10
|
4
|
2
|
Q13
-Compute the mode for the following frequency distribution.
|
Size
of items:
|
0-4
|
4-8
|
8-12
|
12-16
|
16-20
|
20-40
|
24-28
|
28-32
|
32-36
|
36-40
|
|
Frequency:
|
5
|
7
|
9
|
17
|
12
|
10
|
6
|
3
|
1
|
0
|
