Explain the features of a monopoly market structure. What are the characteristics of a natural monopoly?

Estimator and Estimate

Type I and Type II errors in hypothesis testing

Simple random sampling and Stratified random sampling

Measurement of skewness

Age specific birth and death rates

Bayes’ theorem of probability

What is a life table? Explain its uses and limitations.

a) Fit a straight line (Y = a + bX ) to the following data. Compare the estimated values of the dependent variable with its actual values.

X 5 8 10 12 13 15 17 16

Y 8 12 14 10 13 16 14 17

b) Define correlation coefficient. What are its properties?

Bring out the major properties of binomial distribution. Mention certain important uses of this distribution.

The probability that Rajesh will score more than 90 marks in class test is 0.75. What is the probability that Rajesh will secure more than 90 marks in three out of four class tests?

Bring out the distinction between sample survey and census. Describe the steps you would follow in collecting data though a sample survey. Prepare a small questionnaire for collection of income and expenditure levels of households.

 (a) Calculate mean, median and mode from the following data.

(b) Calculate the coefficient of variation from the data given above.

Explain the consequences of specification errors.

What do you understand by Sample regression function? Explain with the help of suitable examples

Which test is employed to compare means of two groups? Explain the test with the help of an example.

Discuss critical region/s. Explain one-tail and two -tail tests.

Differentiate between the concept of association and causation.

Explain the term ‘Normal Distribution’. What is its significance? Explain its characteristics.

Explain the assumptions of a classical regression model.