Chapter 15 : Statistics
Q. Find the mean deviation about median for the following data:
 Marks Number of girls 0-10 6 10-20 8 20-30 14 30-40 16 40-50 4 50-60 2
View Solution
Q. Find the mean deviation about the median for the data
 xi 5 7 9 10 12 15 fi 8 6 2 2 2 6
View Solution
Q. Calculate the mean deviation about median age for the age distribution of 100 persons given below :
 Age Number 16-20 5 21-25 6 26-30 12 31-35 14 36-40 26 41-45 12 46-50 16 51-55 9
View Solution
Q. Find the mean deviation about the mean for the data:
 Income per day Numbers of persons 0-100 4 100-200 8 200-300 9 300-400 10 400-500 7 500-600 5 600-700 4 700-800 3
View Solution
Q. Find the mean deviation about the median for the data
36, 72, 46, 42, 60, 45, 53, 46, 51, 49
View Solution
Q. Find the mean deviation about the mean for the data.
 xi 5 10 15 20 25 fi 7 4 6 3 5
View Solution
Q. Find the mean deviation about the mean for the data
 Height of cms Number of boys 95-105 9 105-115 13 115-125 26 125-135 30 135-145 12 145-155 10
View Solution
Q. Find the mean deviation about the median for the data 13, 17, 16, 14, 11, 13, 10, 16, 11, 18, 12, 17.
View Solution
Q. Find the mean deviation about the mean for the data
38, 70, 48, 40, 42, 55, 63, 46, 54, 44
View Solution
Q. Find the mean deviation about the mean for the data
 Xi 10 30 50 70 90 fi 4 24 28 16 8
View Solution
Q. Find the mean deviation about the mean for the data
4, 7, 8, 9, 10, 12, 13, 17
View Solution
Q. Find the mean deviation about the median for the data
 Xi 15 21 27 30 35 fi 3 5 6 7 8
View Solution
Q. Find the mean and variance for the data
 Xi 92 93 97 98 102 104 109 fi 3 2 3 2 6 3 3
View Solution
Q. Find the mean and variance for the data
 Xi 6 10 14 18 24 28 30 fi 2 4 7 12 8 4 3

View Solution
Q. Find the mean and variance for the following frequency distrubution
 Classes 0-10 10-20 20-30 30-40 40-50 Frequencies 5 8 15 16 6
View Solution
Q. Find the mean and variance for the first 10 multiples of 3
View Solution
Q. Find the mean and standard deviation using short-cut method
 Xi 60 61 62 63 64 65 66 67 68 fi 2 1 12 29 25 12 10 4 5
View Solution
Q. Find the mean and variance for the data 6, 7, 10, 12, 13, 4, 8, 12
View Solution
Q. Find the mean and variance for the first n natural numbers
View Solution
Q. Find the mean and variance for the following frequency distribution
 Classes 0-30 30-60 60-90 90-120 120-150 150-180 180-210 Frequencies 2 3 5 10 3 5 2
View Solution