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Smh2131:Medical Statistics Question Paper
Smh2131:Medical Statistics
Course:Bachelor Of Science In Public Health
Institution: Meru University Of Science And Technology question papers
Exam Year:2014
INSTRUCTIONS: Answer questions one and any other two questions
QUESTION ONE - (30 MARKS)
a) Define the following statistical terms commonly used in statistics (5 Marks)
i. Population
ii. Variable
iii. Mode
iv. Type I error
v. Data
b) State the rules to follow in grouping large data set. (5 Marks)
c) In a heterozygous cross where genetic theory led a researcher to expect tall and dwarf
people in the ration of 3:1 respectively. The researcher obtained 450 tall people out lf the
total 700.
i. State the null and alternative hypothesis (4 Marks)
ii. Calculate the expected values. (2 Marks)
iii. Test whether these results are consistent with genetic theory. (4 Marks)
d) Complete the following cumulative frequency table. (5 Marks)
Haemoglobin
g/dl
Frequency Cumulative frequency
4.15-4.25 2 Lo - Hi Hi-Lo
4.26-4.35 6
4.36-4.45 4
4.46-4.55 5
4.56-4.65 1
2
4.66-4.75 4
4.76-4.85 5
4.86-4.95 2
4.96-5.05 2
5.06-5.15 1
Total frequency
e) Outline the standard procedure for hypothesis testing. (5 Marks)
QUESTION TWO (20 MARKS)
25 Anaemic children of same age were given a pharmaceutical drug preparation for 8 weeks and
each child’s change in body weight was recorde. It was found that the mean change in body
weight was 26.24kg from a population with a known mean weight of 24.8kg and a standard
deviation of 2.4kg.
i. State the appropriate null and alternative hypothesis.
ii. Perform the appropriate test at 0.05 level of confidence and answer the question whether
the drug administered reduced the body weight. (16 Marks)
QUESTION THREE (20 MARKS)
a) Measurements of serum cholesterol (mg/100ml) and auterial calcium deposition
(mg/100g dry weight 0f tissue) were made on 10 animals.
Calcium (mg/100ml) X Cholesterol (mg/100g) Y
59 298
52 303
42 233
59 287
24 236
40 245
32 265
63 286
57 290
36 233
Calculate
i. ?? , ?? (4 Marks)
ii. ??2 , ??2 . (6 Marks)
3
b) An 11 year follow up study of patients suffering from a rarely coronary artery disease
revealed that 390 of the patients were hospitalized 1170 times. What is the probability of
a patient being hospitalized 2 and 5 times? (10 Marks)
QUESTION FOUR (20 MARKS)
Consider the following how birth infant weights in kg 1.2, 1.4, 1.6, 1.8, 2.0, 2.2, 2.4.
Calculate the following;
i. Mean (3 Marks)
ii. Range (2 Marks)
iii. Mean deviation (3 Marks)
iv. Variance (4 Marks)
v. Standard deviation (4 Marks)
vi. Coefficient of variation. (4 Marks)
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