Solve the following questions

Q.1

Draw a Histogram and a Frequency Polygon for the following distribution. Degree of Cloudiness: 10 19 8 7 6 5 4 3 2 1 0 Frequency: 580 150 196 75 55 40 45 68 75 130 -220) Why are frequency distributions constructed? What are the rules to be observed in making a frequency distribution from ungrouped data?Calculate the arithmetic mean, the geometric mean and the harmonic mean of the annual incomes of fifteen families as given below: Rs. 60, 80, 90, 96, 120, 150, 200, 360, 480, 520, 1060, 1200, 1450, 2500, 7200