LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
SECOND SEMESTER – APRIL 2006
TS 27
ZO 2953 - BIO STATISTICS
Date & Time : 26-04-2006/9.00-12.00
Part A
Dept. No.
Max. : 100 Marks
10  2 = 20
(Answer All)
1. Differentiate primary from secondary data collection.
2. What is standard error? Write its significance.
3. Classify sampling techniques.
4. What is meant by dispersion?
5. Differentiate hypothesis from null hypothesis.
6. What is meant by chance selection?
7. Give the formulae for chi square test.
8. Define Hardy-Weinberg law
9. What is frequency polygon?
10. What is probability distribution?
Part B
4  10 = 40
(Answer any four)
11. What are the components of a table?
12. Draw a pie diagram of the following data
Frog
Earthworm
Bird
Bugs
Centipede
2
7
5
12
13
13. Give an account of Skewness and kurtosis
14. Comment on positive and negative correlation.
15. 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.
16. 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
2  20 = 40
(Answer any two)
17. Write notes on Computer application in Bio-Statistics.
18. What are the different methods of collection and representation of data?
19. 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.
20. By ANOVA, find if there is an increase in paddy production in different subspecies 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
219467762
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