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Mathematics For Journalists (Bacj 130) Question Paper

Mathematics For Journalists (Bacj 130)

Course:Communication And Journalism

Institution: Kenya Methodist University question papers

Exam Year:2013

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)

Mathematics For Journalists (Bacj 130) Question Paper

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