LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
SECOND SEMESTER – April 2009
UF 29
ZO 2956 / ZO 2953 - BIOSTATISTICS
Date & Time: 27/04/2009 / 1:00 - 4:00
PART - A
Dept. No.
Max. : 100 Marks
Answer ALL the questions
2 x 10 = 20 Marks
1. What is binomial equation?
2. Differentiate alternate hypothesis from null hypothesis.
3. Distinguish standard error from standard deviation.
4. What is meant by degree of freedom?
5. What is dispersion?
6. What is the significance of bar diagram?
7. Define polygon distribution.
8. Explain the Poissons equation.
9. Classify data collection.
10. Define range.
PART – B
Answer any FOUR of the following
4 x 10 = 40 Marks
11. What are different types of regression analysis?
12. Explain the components of a table.
13. Draw a Pie diagram for the following data and write its significance.
Copper
4
Iron
6
Mercury
24
Lead
7
Zinc
9
14. Differentiate skewness from kurtosis.
15. Write notes on positive and negative correlation.
1
16. Calculate the chi square for the following data and find if there is any significance
between RBC and Hb (Table value = 3.84).
RBC Count
Below
Hb Below
Hb Above
Normal
Normal
80
120
160
130
Normal
Above
Normal
PART – C
Answer any TWO of the following
2 x 20 = 40 Marks
17. The following table shows the effectiveness of antibiotics X in killing bacteria Y.
Apply regression equation X on Y. Calculate when Y=4, 7
Antibiotics (X)
12
14
15
17
19
Bacteria (Y)
5
6
9
11
12
18. Describe different graphical and diagramatic representation of data, with
suitable examples.
19. Draw histogram, polygon and cumulative frequency for the following data.
Wt (gm)
1.1-3.0
3.1-6.0
6.1-9.0
9.1-12.0
12.1-15
11
13
22
21
5
Frequency
15.1-18
20. By ANOVA find if there is an increase in wheat production in different sub
species in different plots A, B, C and D (Table value = 3.49).
A
B
C
D
5
4
6
9
12
6
3
7
11
10
9
5
4
3
1
8
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2
5