Question

3
1. Calculate arithmetic mean from the following data using Step-deviation method:
Marks
0 10 10 20 20 30 30
40 40
50 50 - 60
No. of Students
5
10
25
30
20
10
3
2. Find arithmetic mean from the following data using step-deviation method:
- 40 to
30
30 to
20
20 to
10
10 to Oto 10 to 20 to
0 10 20
30
Temperature
|(°C)
No. of Days
10
28
30
42
65
180
10
3. Calculate arithmetic mean from the following frequency distribution:
3
Class Intervals
0 - 10 10 - 20 20 - 30 30
40 40 - 50 50 - 60
Frequency
5
7
12
18
5
3
4. Following table gives marks in Statistics of the students of a class. Find out mean marks:
3
Marks
0-10
10-20
20-30
30-40
40-50
No. of Students
20
24
40
36
20
5. Calculate arithmetic mean using direct method.
3
10
20
30
40
50
Wage (in)
Number of workers
4
5
3
6. The following table gives the daily income of 10 workers in a factory. Find the arithmetic mean
by using : () Direct method, (i) Assumed mean method, and (iii) Step-deviation method
Lo
Workers
Daily Income (in )
А. в с D E F G
J
120 150 180 200 250 300 220 350 370260​

Answer 1

Answer:

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