LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
M.Sc. DEGREE EXAMINATION – ZOOLOGY
SECOND SEMESTER – APRIL 2011
ZO 2956 – BIOSTATISTICS
Date : 11-04-2011 Dept. No. Max. : 100 Marks
Time : 9:00 – 12:00
PART – A 2 x 10 = 20 Marks
I Answer ALL the questions.
- Differentiate hypothesis from null hypothesis.
- What is regression equation?
- What is co-efficient of range?
- What is meant by degree of freedom?
- What is scatter points?
- What is the significance of histogram?
- Define mean and median.
- Explain poissons equation.
- How is p+q = 1 proved?
- What is standard deviation?
PART – B 4 x 10 = 40 Marks
II Answer any FOUR of the following
- What are primary and secondary data? How is it documented?
- Differentiate skewness from kurtosis?
- Draw a pie diagram for the following data and write its significance.
| Centipede | 11 |
| Millipede | 19 |
| Calotes | 3 |
| Cockroaches | 20 |
| Worms | 17 |
14 Calculate chi square in the given data. Tvalue = 3.84. Comment on significance of treatment
| Affected | NotAffected | |
| Treated | 9 | 17 |
| UnTreated | 7 | 4 |
15 What are the components of a table?
16 Draw histogram and a cumulative frequency of the following data.
| Adult (size in mm) | 1-5 | 5-10 | 10-15 | 15-20 |
| Frequency (Number) | 11 | 17 | 3 | 14 |
PART – C 2 x 20 = 40 Marks
III Answer any TWO of the following
- The following table shows the effectiveness of Anti–biotics X in killing virus Y. Find regression equation X on Y. When Y=11,13 and 17 respectively.
| Antibiotics X | 7 | 9 | 16 | 4 | 28 |
| Virus Y | 5 | 7 | 6 | 7 | 23 |
- What are the different graphs and diagrams in bio statistical representation of data.
- Find standard deviation and standard error from the following data.
| 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 | 11 | 9 | 23 | 7 | 19 | 3 |
- By ANOVA find if there is an increase in millet production in different sub species in different plots. Tv=3.49
| A | B | C | D |
| 4 | 3 | 1 | 5 |
| 2 | 7 | 6 | 9 |
| 6 | 2 | 7 | 2 |
| 4 | 4 | 10 | 4 |
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