LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – ADVANCED ZOOLOGY & BIOTECH.
FIFTH SEMESTER – NOVEMBER 2012
AZ 5402 - BIOSTATISTICS & BIOPHYSICS
Date : 16/11/2012
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
Part-A
Answer All the questions:
(10×2=20 Marks)
1. Define primary data.
2. Comment on frequency curve and frequency polygon.
3. Find the standard deviation for the following data
10
18
15
16
12
15
4. Differentiate bar diagram and histogram.
5. Expand : NMR, LASER, GMC and PAGE
6. Define simple diffusion.
7. What is osmosis?
8. Comment on Autoradiography.
9. Write a note on medical uses of X- rays.
10. Name the types electrophoresis.
Part-B
Answer any FOUR questions:
(4×10=40 Marks)
11. A tobacco company claims that there is no relationship between smoking and lung
ailments. To investigate the claims random sample of 300males in the age groups of
40-50 is given medical test. The observed sample results are tabulated below:
Lung ailment
No lung ailment
Smokers
75
105
Non-smokers
25
95
On the basis of this information, can it be concluded that smoking and lung
ailments are independent? (at 5% level of significance the value of X2=3.841 for 1
d.f).
12. The following table shows the area in millions of square kilometers of the oceans of
the world. Draw the pie diagram to represent the data.
Area (Million sq. km)
Ocean
Pacific
70.8
Atlantic
41.2
Indian
28.5
Antarctic
7.6
Arctic
4.8
13. Find out the students ‘t’ test for the following data. The weight of 10 Guinea pigs (in
grams) when brought in the laboratory and after one month were recorded in the
following table calculate and conclude whether the gain in weight is statistically
significant or not. (Table value 18= 0.862 )
In the
beginning
After the
month
49
41
38
48
52
40
30
38
40
42
52
48
42
54
56
44
36
42
46
48
14. Write notes on Ultrasound.
15. Give an account on Geiger Muller counter.
16. Describe the simple and facilitated diffusion.
Part-C
Answer any TWO questions:
(2×20=40 Marks)
17. Find out the arithmetic mean, standard deviation and draw the frequency polygon
from the following data:
Variables
5-10
10-15
15-20
20-25
25-30
30-35
Frequency
2
9
29
54
11
6
18. Prices of a particular commodity in five years in two cities are given below
Price in city
A
20
22
19
23
16
Price in city B
10
20
18
12
15
19. Write an essay on centrifugation.
20. What is LASER? Explain in detail the types of LASER.
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