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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