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Soci 302: Social Statistics Question Paper

Soci 302: Social Statistics

Course:Bachelor Of Science In Community Development

Institution: Chuka University question papers

Exam Year:2013

CHUKA
UNIVERSITY

UNIVERSITY EXAMINATIONS – EMBU CAMPUS
THIRD YEAR EXAMINATION FOR THE AWARD OF
DEGREE IN BACHELOR OF SCIENCE
IN COMMUNITY DEVELOPMENT

SOCI 302: SOCIAL STATISTICS

STREAM: BSC (CDEV) Y3S1 TIME: 2 HOURS
DAY/DATE: TUESDAY 13/8/2013 2.30 P.M. - 4.30 P.M.
INSTRUCTIONS:
ANSWER QUESTION ONE AND ANY OTHER TWO QUESTIONS
1. (a) Giving examples discuss the types of frequency distribution. [8 marks]
(b) In business and management area diagrammatic presentation is most suitable. Support this statement. [8 marks]
(c) Present the following data into a grouped frequency distribution (inclusive form), use 5 as class width. [5 marks]

11 35 39 25 25 18 6 9 15 10
18 26 14 25 19 16 36 32 20
25 36 5 19 10 19 18 19 4
27 19

(d) From the above grouped data calculate
(i) Mode [3 marks]
(ii) Standard deviation [3 marks]
(iii) Mean [2 marks]
(iv) Coefficient of quartile deviation [4 marks]

2. Giving examples discuss the following; [5 marks]
(a) Population
(b) Interval scale
(c) Descriptive statistics
(d) Mutually exclusive events [20 marks]

3. (a) Present the following information on a percentage pie chart [10 marks]

Sales
Product Kshs. 000
A 200
B 150
C 100
D 150
TOTAL 600

(b) Discuss how diagrammatic presentation would assist a business firm to meet its objectives. [10 marks]

4. Discuss skewness of data as used in research studies. [20 marks]

5. In a bolt factory, machines A, B, and C manufacture respectively 25%, 30%, and 40% of the total of their output. 5, 4 and 2 per cent are defective bolts. A bolt is drawn at random from the product and is found to be defective. What is the probability that it was manufactured by machines. [20 marks]

(i) Machine A
(ii) Machine B
(iii) Machine C

Formulae

(?fx)/(?f),L1+[(f1-f0)/(2(f1)-f0-f2)]c,3(n+1)/4

v((?f(x-x ¯ )^2)/n,) (n+1)/4,

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Soci 302: Social Statistics Question Paper

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