5.12 I FUNDAMENTALS OF BUSINESS MATHEMATICS AND STATISTICS
Measures of Central Tendency and Measures of Dispersion
SELF EXAMINATION QUESTIONS :
- The weight of 6 persons are as follows (in kg.) 70, 42, 85, 75, 68, 55. Find the mean weight.
[Ans. 65.83 kg.] - Find A.M. of the following numbers :
(i) 1, 2, 3, ...... upto 10^ th term [Ans. 5.5]
(ii) The first 10 even numbers [Ans. 11]
(iii) The first 10 odd numbers [Ans. 10] - Find A.M. of the following numbers :
(i) 77, 73, 75, 70, 72, 76, 75, 71, 74, 78 [Ans. 74.10]
(ii) 4, 5, 6, 7, 5, 4, 8, 6, 2, 5, 3 [Ans. 5] - Find A.M. of the given frequency distribution :
(i) Weight (kg.) Persons
50 15
55 20
60 25
65 30
70 30
Total 120
[Ans. 61.67 kg.]
(ii) Weight (kg.) Workers
20 8
21 10
22 11
23 16
24 20
25 25
26 15
27 9
28 6
[Ans. 24.05 Kg.]