1. Practise Questions

2. Problem 1 ABC 8876104 6888 8990118 928688 10379123 A, B and C are three sales persons who sales performance performance of product Z for last 5 years has been as shown in the following table and answer the questions below the table. Calculate the coefficient of variation for sales performance of A, B and C and determine whose sales performance has more or less relative variation among A, B and C

3. Problem 2 The following table details prices of Product X and Product Y for the last 9 months Product X (in Rs.)Product Y (in Rs.) 1831 2716 2342 2120 2218 2617 3916 1715 2819 Calculate skewness and kurtosis in prices. Also interpret skewness and kurtosis

4. Problem 3 PriceQuantity 57 37 36 14 The table below shows the price and quantity supplied for Product U. Calculate the Karl Pearson’s correlation coefficient (r) between X and Y If the probable error (P.E.) of r = 0.6745 * [(1-r 2 )/n], find whether X and Y are strongly or weakly correlated and significant?