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Bacj 130:Mathematics For Journalists Question Paper

Bacj 130:Mathematics For Journalists

Course:Communication And Journalism

Institution: Kenya Methodist University question papers

Exam Year:2013

KENYA METHODIST UNIVERSITY

END OF 1ST TRIMESTER 2013 (DAY) EXAMINATION
FACULTY : EDUCATION AND SOCIAL SCIENCES
DEPARTMENT : COMMUNICATION AND JOURNALISM
UNIT CODE : BACJ 130
UNIT TITLE : MATHEMATICS FOR JOURNALISTS
TIME : 2 HOURS

Instructions

Answer question one and any other two

Question One

Define the following term.
Research
Data
Statistics
Phenomenon

Variable

(5 marks)

Differentiate between the following terms:
Independent variable

Dependent variable.

(4 marks)

Using relevant examples explain the role of statistics in society.

(5 marks)

Distinguish between the following terms.
Qualitative and quantitative variables
Population and sample

Descriptive and inferential statistics.

(6 marks)

Describe three measures of dispersion.

(6 marks)

If the mean of the values 14, y 17, 16 and y is y+0.4 find the value of y.

(4 marks)

Question Two

Given the following data

Age 0-10 10-20 20-30 30-40 40-50 50-60 60-70
No. of Pple 6 7 20 24 18 20 5

Compute:

Mean

Standard deviation.

(8 marks)

A certain couple plans to have six children. Their chance of having a girl is 0.2. Determine probability that they will have
Exactly two girls

Exactly 4 girls.

(6 marks)

Define:
Mode
Range

Correlation

(6 marks)

Question Three

Define the following terms as used in probability and statistics.
Event
Sample space
Error rate
Probability

Confidence level.

(5 marks)

In a small estate with 50 families, 35 watch KBC news at 9.00 p.m. 30 watch KTN news at 11.00p.m. While 8 tune to other stations.

Draw a Venn diagram representing this information hence find the probability that a randomly chosen family/household watches:

Both news briefs

KTN news briefs and not KBC news briefs.

(7 marks)

Describe and elaborate on the following:
Purposive sampling
Random sampling
Experimental group

Control group.

(8 marks)

Question Four

Distinguish between quota sampling cluster sampling.

(4 marks)

Explain the term sampling frame.

(4 marks)

Describe the steps you would follow to determine a sample.

(8 marks)

Give the characteristics of a good sample design.

(4 marks)

Bacj 130:Mathematics For Journalists Question Paper

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