Fisheries  Level-2 Semester-1 Statistics question 2015, 16, 17 -- STT205

 

 


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 Hajee Mohammad Danesh Science and Technology University, Dinajpur B.Sc. Fisheries (Hons), Level-2 Semester-1, Final Examination (Jan-Jun), 2017 Course Title: Statistics, Course Code: STT205

Full Marks: 90.

Time: 3 Hours

Answer any three questions from each section

SECTION-A

1. a. Define statistics with its application in fisheries. Briefly discuss population and sample 5

with example. b. What do you mean by variable? Define different types of variables with example.

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c. Discuss frequency distribution, inclusive method and exclusive method of frequency distribution. How can we construct frequency distribution from a raw data?

2. a. What is central tendency? State the characteristics of an ideal measure of central 3 tendency.

b. Discuss different measures of central tendencies. 6 c. For two non-zero positive observations, show that AM 2GM2 HM, where AM, GM 6

and HM have usual meanings.

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3. a. Define dispersion of data. Why do we need measures of dispersion?

b. Write down different measures of dispersion known to you. Define: mean deviation and 6 co-efficient of variation. State under which situation coefficient of variation (cv) is used.

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c. Show that: standard deviation is independent of change of origin but dependent on scale.

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c. Discuss regression analysis and regression model. Define coefficient of determination 6

with its use.

4. a. Discuss correlation analysis. Define positive, negative, simple and multiple correlation.

b. Draw the scatter diagram for different types of correlations.

SECTION-D

1. a. Define with example: experiment, outcomes, sample space and mutually exclusive 4

outcomes. b. What is the classical and mathematical probability? Write down the properties of 5

probability.

e. Discuss rules of addition, rules of multiplication and conditional probability example.

2. What is probability distribution? Discuss Binomial distribution. Write dow..

conditions for Binomial distribution.

distribution.

b. Discuss Poisson distribution. Write down some examples where we can use Poisson e. Define Normal distribution and standard normal distribution. Write down the 6

importance of Normal distribution.