LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
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SECOND SEMESTER – APRIL 2006
ZO 2953 – BIO STATISTICS
Date & Time : 26-04-2006/9.00-12.00 Dept. No. Max. : 100 Marks
Part A (Answer All) 10 ´ 2 = 20
- Differentiate primary from secondary data collection.
- What is standard error? Write its significance.
- Classify sampling techniques.
- What is meant by dispersion?
- Differentiate hypothesis from null hypothesis.
- What is meant by chance selection?
- Give the formulae for chi square test.
- Define Hardy-Weinberg law
- What is frequency polygon?
- What is probability distribution?
Part B (Answer any four) 4 ´ 10 = 40
- What are the components of a table?
- Draw a pie diagram of the following data
| Frog | Earthworm | Bird | Bugs | Centipede |
| 2 | 7 | 5 | 12 | 13 |
- Give an account of Skewness and kurtosis
- Comment on positive and negative correlation.
- Calculate the standard deviation and standard error of mean from the following data.
Glucose level in mg/100ml of blood samples as 84, 96, 105, 96, 98, 106, 11, 103,
106, 116 and 89.
- The RBC count and Hb% gr/100 ml of 500 persons are recorded. Is there any
significance between RBC and Hb?
| RBC Count | Hb above normal | Hb below normal |
| Above normal | 85 | 75 |
| Below normal | 165 | 175 |
(at p 5% level of Table value of Chi square @ 1df = 3.84)
Part C (Answer any two) 2 ´ 20 = 40
- Write notes on Computer application in Bio-Statistics.
- What are the different methods of collection and representation of data?
- Regression correlation x on y for number of ponds (x) in a town and number of fishes
(y) is as follows.
| x | 10 | 9 | 8 | 7 | 6 | 5 |
| Y | 230 | 220 | 218 | 200 | 181 | 168 |
Find y when x = 4,3,2 respectively.
- By ANOVA, find if there is an increase in paddy production in different sub- species in different plots.
| A | B | C | D |
| 7 | 6 | 3 | 4 |
| 8 | 7 | 2 | 5 |
| 11 | 9 | 1 | 2 |
| 12 | 11 | 7 | 4 |
TV = 6.05