Page 1 - Home assignment on mean

HOME ASSIGNMENT

Statistics for Economics

Measure of central tendency- Arithmetic mean

Question Very short answer type questions Marks
No
1. 1
Sum of deviation about mean is ---------.

2. The mean of 12 numbers is 24. If 5 is added in every 1
number , then new mean is
(a)25(b) 20(c)29(d)17
3. Average value of given variable is known as median , 1
True or False
4. Write the formula for combined mean. 1

5. In case of open ended series Arithmetic mean is 1
calculated in usual manner without making any changes
. Defend or refute .
Short answer type questions (3 or 4)

6. Find out mean of the series of the following data by 3
Step deviation method.
X 3 4 5 6 7 8
F 6 9 11 14 23 10

7. From the following information obtain mean by direct 3
methods .

X 0-4 4-8 8-12 12-16 16-20 20-24 24-28
F 3 6 9 12 9 6 3

8. Find out mean from the following data by short cut 4
method .
X 5-10 10-15 15-20 20-25 25-30 30-35 35-40
F 04 05 03 02 06 07 03

9. Find out mean from the following data by step deviation 4
method .

X 5-10 10-15 15-20 20-25 25-30 30-35 35-40
F 04 05 03 02 06 07 03

10. Find out mean from the following data . 4
X Below10 10- 15- 20- 25- 30- Above