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The weight of coffee in 70 jars is shown in the following table: Weight (in grams):, 200-201 , 201-202 , 202-203 , 203-204 , 204-205, 205-206 F r e q u e n c y , 13, 27, 18, 10, 1, 1 Determine the variance and standard deviation of the above distribution.

The weight of coffee in 70 jars is shown in the following table: Weight (in grams): 200-201 201-202 202-203 203-204 204-205 205-206 F r e q u e n c y 13 27 18 10 1 1 Determine the variance and standard deviation of the above distribution.

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The sum of the series C(20,0)-C(20,1)+C(20,2)-C(20,3)+...-...+C(20,10) is

CH. 14 STATISTICS Q1 Class 0-8 8-16 16-24 24-32 32-40 Frequency 10 12 26 9 15 e mean of above data by: () Direct method () Assumed mean method (ii) Step deviati iop metod. Q2 The following distribution shows the daily pocket allowance of children of a locali ty. The mean pocket allowance is Rs 20. Find the missing frequency Daily Pocket 0-20 20-40 40-60 0-80 80-100 No. Of Children 7 10 9 13 Q3. The following table shows age distribution of persons in a particular region. Find the: (0) mean age (i)modal age (ili) median age Age? Below!0 Below20 Below30 Below 40, Below 50 Belo No, persons ? 250 190 100 40 15 4 Arithmetic mean of the following frequency distribution is 50. Find the missing frequencies C.I. ? 0-20 20-40 40-60 60-80 80-100 Tota

Study the following table carefully and answer the questions given below it. Number of T.V. channels telecast in various cities in a year (Number in thousands). {:(,,"T.V.","Channels",,),("Cities","MTv","ESPN","Aaj TaK","CNBC","Sahara"),(A,14,23,27,0.7,0.5),(B,10.2,12,26,2,0.3),(C,7.5,7,10,1.8,0.6),(D,13.1,8,20,2,3.5),(E,19,15.6,13,5,2.1),(F,13,10.0,10.8,2.7,6.2):} The Sahara channel telecast in City A is what percent of the channel Aajtak telecast in city C ?

On one page of a telephone directory, there were 200 telephone numbers. The frequency distribution of their unit place digit (for example, in the number 25828573, the unit place digit is 3) is given in the table below: D igi t : 0 1 2 3 4 5 6 7 8 9 F r e q u e n c y 22 26 22 22 20 10 14 28 16 20 A number is chosen at random, find the probability that the digit at its units place is: 6 (ii) a non-zero multiple of 3 a non-zero even number (iv) an odd number

Study the following table carefully and answer the questions given below it. Number of T.V. channels telecast in various cities in a year (Number in thousands). {:(,,"T.V.","Channels",,),("Cities","MTv","ESPN","Aaj TaK","CNBC","Sahara"),(A,14,23,27,0.7,0.5),(B,10.2,12,26,2,0.3),(C,7.5,7,10,1.8,0.6),(D,13.1,8,20,2,3.5),(E,19,15.6,13,5,2.1),(F,13,10.0,10.8,2.7,6.2):} What is the respective ratio of the number of CNBC channel telecast in city 'D' to the number of ESPN channels telecast in the city F ?

Study the following table carefully and answer the questions given below it. Number of T.V. channels telecast in various cities in a year (Number in thousands). {:(,,"T.V.","Channels",,),("Cities","MTv","ESPN","Aaj TaK","CNBC","Sahara"),(A,14,23,27,0.7,0.5),(B,10.2,12,26,2,0.3),(C,7.5,7,10,1.8,0.6),(D,13.1,8,20,2,3.5),(E,19,15.6,13,5,2.1),(F,13,10.0,10.8,2.7,6.2):} What is the total number of Sahara channels telecast in all the cities together ?