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Hcr 300: Introduction To Statistics Question Paper

Hcr 300: Introduction To Statistics

Course:Statistics

Institution: Kenyatta University question papers

Exam Year:2011

INSTRUCTIONS:
Answer QUESTION ONE and ANY OTHER TWO (2) questions.

1.
In a genetic inheritance study blood samples were collected from individuals and several
variables measured. The statistics for the mean chromosome exchange for both white
Americans and black Americans were compared and the data presented in the table below
Race
Mean chromosome exchange
Black Americans 8.50 9.48 8.65 8.16 8.83 7.76 8.63 7.89 7.77
White Americans 8.27 8.20 8.25 8.14 9.00 8.10 7.20 8.32 7.70

Using the data compute the following:
(a)
Determine the standard deviation for each race.
[15 marks]
(b)
Transform each of the scores into a standard score.
[15 marks]

2.
Demonstrate the characteristics and limitations of statistics in social research. [20 marks]

3.
Evaluate the advantages and disadvantages of non-parametric measures in social research.

[20 marks]

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4.
A statistics professor gave an examination to a class of 32 students and obtained the
following results:
Student number
Marks
Student number
Marks
1
78
17
78
2
24
18
24
3
64
19
62
4
45
20
48
5
64
21
68
6
52
22
56
7
30
23
25
8
50
24
44
9
64
25
56
10
50
26
40
11
78
27
68
12
22
28
36
13
84
29
68
14
40
30
20
15
90
31
58
16
72
32
32

(a)
Determine the mean, mode and the median.
[10 marks]
(b)
Develop a frequency distribution for the scores.
[10 marks]

5.
Bagbo took three standardized tests with the following results.
Test
Score
Mean
Standard deviation
Research Methods
85
82
10
Sociological Theory
80
75
8
Social Statistics
80
90
12
Medical Sociology
60
55
9

(a)
Compute a Z-score for each of Bagbo’s test scores.

[10 marks]
(b)
What appears to be Bagbo’s strongest area?

[10 marks]
===============================================================

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Hcr 300: Introduction To Statistics Question Paper

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