Answer question number 30

Answer question number 30 distribution: Calculate Mean and variance for the following frequency 9 8 x 6 5 4 3 2 4 10 13 18 21 16 8 2 5 10 3 0.31. Calculate Mean, Standard Deviation and Variance: Variable Frequency 2 5-10 5 10-15 15-20 20-25 25-30 30-35 3340 16 21 13 7 21.9, S.D. 7.95, 63.201 Q.32. Calculate the Coefficient of Variation for the following distribution of the wages of workers in a factory: 40-49 50-59 60-69 70-79 80-89 90-99 100-109 Wages (in C) 11 23 40 60 35 16 NO. Of Workers [X = 7445, S.D. = 15.921, C.V. = 2138%1 Q.33. The following are the scores made by two batsmen A and B in a series of innings: 119 36 84 19 7 6 73 12 115 A 13 48 37 51 4 76 42 B 47 12 Who is better as a run-getter? Who is more consistent? 29 0 IA: = 50, S.D. 4183, C.V. = 8366% B: = 33, S.D. = 2337, C.V. - 7082801 (A is better as run-getter and B is more consistent.) Q.34. The index number of prices of cotton and coal shares in 1998 were as under: Month: Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Index Number of Prices: Cotton: 188 178 173 164 172 183 184 185 211 217 232 240 coal: 131 130 130 129 129 129 127 127 130 137 140 142 Which of these two shares do you consider more variable in prices: [Cotton: = 193.9, S.D. = 23.80, C.V. = 1227% coal: = 131.75, S.D. 4815, C.V = 365% . Cotton shares are more variable in prices] Q. 35. Calculate the arithmetic mean, standard deviation and variance from the following distribution: Class Frequency : 2 POCO SHOT ON poco Fl 5 70-80 7 7 60-70 11 13 21 3 16 8 = 21.9, S.D. = 7.99, 63.97] 50-60 40-50 30-40 20-30

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