LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
SECOND SEMESTER – APRIL 2012
ZO 2956 – BIOSTATISTICS
Date : 24-04-2012 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A 10 x 2 = 20 Marks
I Answer ALL the questions:
- What is the significance of student t test?
- How do you find range?
- Explain binomial equation.
- Comment on sampling techniques.
- What is Hardy Weinburg’s law?
- Differentiate primary from secondary data.
- What is standard error?
- Differentiate histogram from bar diagram.
- What is correlation?
- Explain degree of freedom?
PART – B 4 x 10 = 40 Marks
II Answer any FOUR of the following:
- What are the different kinds of regression?
- What are the components of a table?
- Draw a pie diagram for the following data and write its significance.
| Earthworm | 12 |
| Cockroach | 11 |
| Millipede | 9 |
| Centipede | 17 |
| Bugs | 16 |
14 What is skewness and kurtosis?
15 What are the different types of co-efficient of correlation?
16 Calculate the chi square for the following table and find if there is any significance between RBC and Hb.
| RBC Count | Hb Below Normal | Hb Above Normal |
| Below Normal | 64 | 120 |
| Above Normal | 141 | 173 |
PART – C 2 x 20 = 40 Marks
III Answer any TWO of the following:
- Write a note on SPSS applications in bio-statistics.
- What is the significance of graphs and diagrams?
- By ANOVA find if there is an increase in maize production in different sub species in different plots. Tv=3.49
| A | B | C | D |
| 6 | 7 | 9 | 7 |
| 8 | 9 | 11 | 6 |
| 7 | 5 | 8 | 4 |
| 3 | 7 | 4 | 3 |
- The following table shows the age x and BP of six individuals. Find regression equation of X on Y and estimate BP of a person of 61, 68 and 75 years respectively.
| Age (x) | 29 | 41 | 63 | 69 | 80 | 78 |
| BP (Y) | 131 | 139 | 140 | 153 | 171 | 133 |