LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
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M.Sc. DEGREE EXAMINATION – ZOOLOGY
SECOND SEMESTER – APRIL 2007
ZO 2953 – BIO STATISTICS
Date & Time: 24/04/2007 / 1:00 – 4:00 Dept. No. Max. : 100 Marks
PART – A 10 x 2 = 20 Marks
Answer ALL the questions.
- What is probability distribution?
- What is standard deviation?
- Explain frequency polygon.
- What is meant by chance selection?
- What is the significance of chi square analysis?
- What is the significance of three dimensional graph?
- What is meant by degree of freedom?
- Differentiate primary and secondary data collections.
- What is co-efficient of range?
- Classify sampling techniques.
PART – B 4 x 10 = 40 Marks
Answer any FOUR of the following
- What are the components of a table?
- Write notes on skewness and kurtosis.
- Draw a pie diagram for the following data and write its significance.
| Lizard | 2 |
| Cockroaches | 13 |
| Spider | 15 |
| Mite | 31 |
| Bugs | 21 |
14 Comment on positive and negative correlations.
15 What are the different kinds of regression analysis?
16 The RBC Count and Hb of 270 persons were recorded. 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 | 90 | 150 |
| Above Normal | 160 | 120 |
PART – C 2 x 20 = 40 Marks
Answer any TWO of the following
- What are the different methods of collection and representation of data in statistics?
- Write a note on computer applications in bio-statistics.
- Calculate standard error of mean in continuous series in the given data. Frequency of weight of
earthworms of some species is given below.
| Wt (gm) | 1.1-3.0 | 3.1-6.0 | 6.1-9.0 | 9.1-12.0 | 12.1-15 | 15.1-18 |
| Frequency | 7 | 9 | 13 | 2 | 7 | 1 |
- By ANOVA find if there is an increase in cereal production in different sub species in different
plots. Tv=3.84
| A | B | C | D |
| 3 | 6 | 8 | 1 |
| 2 | 7 | 5 | 3 |
| 6 | 3 | 2 | 5 |
| 7 | 1 | 8 | 4 |
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