# EEC-13 English Medium Solved Assignment 2018

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Assignment Code: EEC-13/AST/TMA/2017-18

Medium: English

## Description

EEC-13 ELEMENTARY STATISTICAL METHODS AND SURVEY TECHNIQUES SOLVED ASSIGNMENT

Programme Code: BDP (BA)

Course Code: EEC-13

Course Name: ELEMENTARY STATISTICAL METHODS AND SURVEY TECHNIQUES

Session: 2017-18

Assignment Code: EEC-13/AST/TMA/2017-18

Medium: English

Questions Solved In Assignment:

1. (a) Explain the concepts of skewness and kurtosis. Briefly describe how these can be measured.
(b) The median, mode and Karl Person’s coefficient of skewness of a distribution are 17.4, 15.3 and 0.35 respectively. Calculate the coefficient of variation of the distribution.
2. (a) Explain the concepts of level of significance and rejection region using suitable diagram of a standard normal curve.
(b) Explain the concept of standard error through a suitable example. What are its implications?
(c) How do you construct confidence interval for a statistic? What are its implications?
3. Define probability distribution function of binomial distribution. Assume that the probability of a boat reaching its destination safely is 0.9. Under the assumption of binomialdistribution, find the mean and standard deviation of boats reaching destination safely out of a total 500 boats.
4. Calculate index numbers using Paasche’s method and Fisher’s method from the following data.
5. a) Define correlation coefficient. What are its properties?
b) Fit a straight line (Y = a + bX) to the following data. Compare the estimated values of the
dependent variable with its actual values.
6. What is a life table? Explain its uses and limitations.
7. Write short notes on the following:
(a)Bayes’ theorem of probability
(b)Age specific birth and death rates
8. Differentiate between the following:
(a) Simple random sampling and Stratified random sampling
(b) Type I and Type II errors in hypothesis testing

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