What do you mean by "pie diagram"? Write the steps involved in constructing it. 2. Write any four methods of collecting the primary data. Explain any one method alongwith its two 6 its and two demerits. . Calculate the standard deviation from the following data: 0-20 81 80-100 14 Weight (Kg) No. of Person 60-80 49 40-60 66 20-40 40 OR Calculate the coefficient of correlation for the following data by the actual mean method. 71 69 70 72 69 72 68 69 67 66 66 68 65 67 Indian estions 14 to 28 related to Part-B and Part-C are given in other book onomic Development.

What do you mean by "pie diagram"? Write the steps involved in constructing it. 2. Write any four methods of collecting the primary data. Explain any one method alongwith its two 6 its and two demerits. . Calculate the standard deviation from the following data: 0-20 81 80-100 14 Weight (Kg) No. of Person 60-80 49 40-60 66 20-40 40 OR Calculate the coefficient of correlation for the following data by the actual mean method. 71 69 70 72 69 72 68 69 67 66 66 68 65 67 Indian estions 14 to 28 related to Part-B and Part-C are given in other book onomic Development. Calculate the coefficient of correlation for the following data by the actual mean method. 69 72