The following frequency distribution gives the monthly consumption of electricity of 68 consumers of a locality. Find the median, mean and mode of the data and compare them. Monthly consump-  65-85  85-105  105-125  125-145  145-165  165-185  185-205 No. of consumers:     4        5       13        20        14       8          4

Compute the modal value for the following frequency distribution: x : 95 105 115 125 135 145 155 165 175 y : 4 2 18 22 21 19 10 3 2

Following is the distribution of I.Q. of 100 students. Find the median I.Q. I.Q. 55-64 65-74 75-84 85-94 95-104 105-114 115-124 125-134 135-144 No. of Students: 1 2 9 22 33 22 8 2 1

Compute the median from the following data: Mid-value: 115 125 135 145 155 165 175 185 195 Frequency: 6 25 48 72 116 60 38 22 3

Following are the observations of a data sample in ascending order. If the mean of the sample is 18.5 and the mode is 15.5, find the missing data items. 12.5 13.8 15.5 x 19.2 20.4 y 23.5 24.6

The following table gives the number of finished articles turned out per day be different number of workers in a factors. Find the standard deviation of the daily output of finished articles. Find the variance and standard deviation of the following frequency distribution: Number of article:, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 No. of workers:, 3, 7, 11, 14, 18, 17, 13, 8, 5, 4

The following table gives the number of finished articles turned out per day be different number of workers in a factors. Find the standard deviation of the daily output of finished articles. Find the variance and standard deviation of the following frequency distribution: Number of article:, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 No. of workers:, 3, 7, 11, 14, 18, 17, 13, 8, 5, 4

Calculate the mean and median for the following data: Marks: 10 11 12 13 14 16 19 20 Number of students: 3 5 4 5 2 3 2 1 Using empirical formula, find its mode.

The median from the following data is {:("Mid-value","Frequency"),(115,6),(125,25),(135,48),(145,72),(155,116),(165,60),(175,38),(185,22),(195,3):}

Construct a frequency distribution table for the following data, taking class-intervals 4-6, 6-8 , ............. 14-16 . 11.5, 6.3, 7.8, 9.2, 10.5, 4.5, 6, 8.3, 12.5, 15.8, 7.4, 5.3, 8.4, 15.2, 8.9, 9.8, 8.25, 6.5, 5.8, 10.5, 14.2, 15.3, 11.7, 9.9, 8.8, 6.6, 4.3, 4.7, 9.4, 10.1, 15.5, 14.4, 12.2, 7.7, 5.5 .