Iph2202:Medical Virology Question Paper
Iph2202:Medical Virology
Course:Bachelor Of Science In Public Health
Institution: Meru University Of Science And Technology question papers
Exam Year:2013
INSTRUCTIONS: Answer question one and any other two questions
QUESTION ONE – 30 MARKS
a. List and explain briefly three points showing the importance of statistics. (6 Marks)
b. The age of children in a peadiatric ward was given as follows:
Age (years) 2 3 4 5 6 7 8 10
f 5 8 6 4 2 1 2 1
Find the quartiles and represent the data in a box and whisker diagramme. (6 Marks)
c. The mean number of caesarian sections in a certain hospital is 5 per week. Find the probability that
there will be less than three sections in a given week. (6 Marks)
d. The number of new admissions per day in a certain hospital follows a normal distribution with a
mean of 15 and a standard deviation of 5. Find the probability that the number will be less than 8
on any given day. (6 Marks)
e. An anaesthetic drug purported to give an effective period of 2.5hours was used on seven patients
and the effective times recorded had a mean of 2.1 hours and a standard deviation of 0.3hours. Use
the information to test the claim at 5% level of significance. (6 Marks)
QUESTION TWO – 20 MARKS
To find out which one of the three common painkillers is most used, independent samples of users from
3 different villages were taken and each respondent named the painkiller he/she uses most. The
following results were recorded.
2
Painkiller
Village
Using any appropriate test of your choice find at 95% level of significance if the level of use is related
to the village or not. (20 Marks)
QUESTION THREE – 20 MARKS
Find the mean, the median and the standard deviation of the data set in the following frequency
distribution. (20 Marks)
X f
3 4
5 8
8 10
12 5
14 2
18 1
QUESTION FOUR – 20 MARKS
A researcher wants to find if a certain drug has an effect on the pulse rate of human subjects. The
following results are obtained when the drug is used on five patients of almost the same weight.
Dose (x) 1.5 2.0 2.5 3.0 3.5
Drop in pulse rate (y) 3 7 9 9 15
a. Draw a scatter plot of y against x and discuss it. (8 Marks)
b. Find the coefficient of correlation and the equation of the relationship. (12 Marks)
A B C
X 15 22 17
Y 13 20 15
Z 21 18 20
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