IGNOU MMPC-005 June 2022 Previous Year Question Paper

Q1.“The standard deviation is the most widely used and important measure of variation.” Comment on the statement. Also, discuss the properties of a good measure of variation. [ 2 ]

Q2.From the following data , compute arithmetic mean by short-cut method : Marks No. of Students 0—10 5 10—20 10 20—30 25 30—40 30 40—50 20 50—60

Q4.“Time series analysis is one of the most powerful methods in use, especially for short - term forecasting purposes.” Comment on the statement. Also, explain the decomposition method.

Q5.What are the various key issues in decision theory ? Explain the decision tree approach.

Q6.Write short notes on any three of the following :

(a) Coefficient of variation

(b) Bayes’ theorem

(c) Probability sampling method

(d) Correlation coefficient

(e) Chi-square distribution

Q7.A company that manufactures batteries guarantees them a life of 24 months.

(i) If the average life has been found in tests to be 33 months and a S. D. of 4 months, how many will have to be replaced under guarantee if a normal distribution is assumed for battery lifetimes ?

(ii) If an nual sales are 10,000 batteries at a profit of ` 50 each and each replacement costs the company ` 100, find the net profit.

Q8.What do you understand by the term “Hypothesis” ? Explain null and alternate hypothesis along with the help of examples.