Data Interpretation Set : Frequency Distribution Table

Directions ( Questions 1 to 3) : The questions given are based on the following table. Study the table carefully and  answer the questions.

I.Q.
(x)
   Classification           F
% of population
Deviation d from A = 95 in term of 10       fd
135
125
115
105
95
85
75
65
Very superior
Superior
Bright normal
Above average
Average
Dull normal
Border line
Mentally defective
2.1
6.2
16.0
20.2
29.8
16.2
7.2
2.3
4
3
2
1
0
-1
-2
-3
8.4
18.6
32.0

20.2
0
-16.2
-14.4
6.9
Total 100.0 79.2-37.5
= 41.7

Ques 1. 

The average I.Q. of the population classified below'Average' is nearly
(a) 88.4
(b) 76.2
(c) 80.4
(d) None of these
Ans 1. Average I.Q. of the population classified below 'Average'

Ques 2.

The average I.Q. of the entire population is nearly
(a) 88.2
(b) 105.3
(c) 99.2
(d) None of these
Ans 2. Average I.Q. of the entire  population


Ques 3.

The ratio of the population classified below 'Average' to the total population,is nearly
(a) 1/3
(b) 1/8
(c)1/5
(d) 1/4
Ans 3. 


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