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Mls 2404 : Medical Statistics Question Paper

Mls 2404 : Medical Statistics

Course:Bachelor Of Science In Medical Laboratory Sciences

Institution: Jomo Kenyatta University Of Agriculture And Technology question papers

Exam Year:2012

JOMO KENYATTA UNIVERSITY
OF
AGRICULTURE AND TECHNOLOGY

University Examinations 2012/2013

FOURTH YEAR FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF SCIENCE IN MEDICAL LABORATORY SCIENCES

MLS 2404 : MEDICAL STATISTICS

DATE: AUGUST 2012 TIME: 2 HOURS

SECTION A: MULTIPLE CHOICE QUESTONS
INSTRUCTIONS: ANSWER ALL QUESTIONS IN THIS SECTION

Q1. A researcher wishes to draw a sample of individuals from poor, middle and rich economic classes. Which type of sampling method is appropriate?

(a) Simple random sampling.
(b) Stratified sampling.
(c) Systematic sampling.
(d) Convenient sampling.

Q2. What test is used in the analysis of variance?

(a) F-test.
(b) T-test..
(c) Chi-square.
(d) Z-statistic.

Q3. What is the probability of rejecting the null hypothesis when its true called?

(a) Type-I error.
(b) Type-II error
(c) Least error
(d) None of the above.

Q4. P(A/B) = ? when A and B are non-independent events:

(a) P(A)/P(B)
(b) P(B) + P(B)
(c) P(AB) P(B)
(d) P(AB/P(B)

Q5. Which of these is not a method of data collection:

(a) Questionnaire.
(b) Interviews.
(c) Experiments.
(d) Observations.

Q6. When each member of a population has equal chance of being selected, this is called:

(a) Non-random sampling.
(b) A quota sample.
(c) A snow-ball sample.
(d) An equal probability selection method.

Q7. A number calculated with full complete population data and quantifies a characteristic of the population is called:

(a) A datum.
(b) A statistic.
(c) A parameter.
(d) A population.

Q8. Research participants must give __________ before they participate in a research study:

(a) Guidelines.
(b) Informed consent.
(c) Commitment.
(d) Private information.

Q9. When an extraneous variable systematically varies with the independent variable and influences the dependent variable; it is called:

(a) Another dependent variable.
(b) A confounding variable.
(c) A moderating variable.
(d) An unreliable variable.

Q10. A condition or characteristic that can take on different values or categories is called:

(a) Constant.
(b) A variable.
(c) A cause and effect relationship.
(d) A descriptive relationship.

Q11. Which of the following correlations is the strongest?

(a) +0.10
(b) -0.95
(c) +0.9
(d) -1.00

Q12. Which of the following is the simplest form of measurement?

(a) Norminal.
(b) Original.
(c) Interval.
(d) Ratio.

Q13. ANOVA is:

(a) Used to help equate groups on specific variables.
(b) Used to control sequencing effects.
(c) Used to substitute for random assignment to groups.
(d) Adjust scores on the independent variable to control for extraneous variables.

Q14. What is the median of the following set of scores 18, 6, 12, 10, 14:

(a) 10
(b) 14
(c) 18
(d) 12

Q15. Approximately what percentage of scores fall within one standard deviation of the mean in a normal distribution?

(a) 34%
(b) 95%
(c) 99%
(d) 68%

Q16. The standard deviation is:

(a) A square root of variance.
(b) A measure of variability.
(c) An approximate indicator of how numbers vary from the mean.
(d) All of the above.

Q17. The goal of ________ is the focus of summarizing and explaining a specific date:

(a) Inferential statistics.
(b) Descriptive statistics.
(c) None of the above.
(d) All of the above.

Q18. The most frequently occurring numbers in a set of values is called:

(a) Mean.
(b) Median.
(c) Mode.
(d) Midrange.

Q19. As a rule, the ________ is the best measure of central tendency because its more precise:

(a) Mean.
(b) Median.
(c) Mode.
(d) Range.

Q20. Which of the following is the formula for range:

(a) H + L
(b) L x H
(c) L - H
(d) H - L

SECTION B: SHORT ANSWER QUESTIONS
INSTRUCTIONS: ANSWER ALL QUESTIONS IN THIS SECTION

Q21. Write short notes on the following:

(a) Variables.
(b) Non-parametric tests.
(c) Parametric tests. [6 marks]

Q22. Briefly describe any three scales of measurements. [6 marks]

Q23. Briefly describe the steps involved in hypothesis testing.
[6 marks]

Q24. Describe any three types of parametric tests. [6 marks]

Q25. Distinguish between the following terms: [6 marks]

(a) Test statistic and sample statistic.
(b) Categorical and numerical variable.
(c) Parameter and statistic.

SECTION C: LONG ANSWER QUESTONS.
INSTRUCTIONS: ANSWER ONLY ONE QUESTION IN THIS SECTION

Q26. The data below shows marks scored in two Medical Laboratory Science units: Pathology and Clinical Chemistry.

Pathology: 56, 75, 45, 71, 61, 64, 58, 80, 76, 61
Clinical Chemistry: 66, 70, 40, 60, 65, 56, 59, 77, 67, 63

(a) Rank the scores.
(b) Calculate the di for each set of scores.
(c) Calculate d for each score.
(d) Calculate the Spearman-rank-order correlation coefficient
and write down your conclusion.
[20 marks]

Q27. Write an essay on the topic “Methods of displaying data in medical statistics”. [20 marks]

Q28. Write an essay on the topic “methods of displaying data” using relevant examples. [20 marks]

Mls 2404 : Medical Statistics Question Paper

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