Measures of Central Tendency: JEE Questions & Solutions

If the mean and the variance of the data are and 19 respectively, then the value of + is

The mean and variance of a data of 10 observations are 10 and 2, respectively. If an observation in this data is replaced by, then the mean…

Marks obtained by all the students of class 12 are presented in a frequency distribution with classes of equal width. Let the median of…

Let x1, x2,, x10 be ten observations such that i=1^10 (xi - 2) = 30, i=1^10 (xi -)^2 = 98, 2, and their variance is 45. If and ^2 are…

If the mean and variance of the data 65, 68, 58, 44, 48, 45, 60,,, 60 where are 56 and 66.2 respectively, then ^2 + ^2 is equal to:

If the mean and variance of five observations are 245 and 19425 respectively, and the mean of the first four observations is 72, then the…

Let M denote the median of the following frequency distribution. Class Frequency 0-4 3 4-8 9 8-12 10 12-16 8 16-20 6 Then 20M is equal to:

Let X = 11, 12, 13,, 41 and Y = 61, 62, 63,, 91 be two sets of observations. If x and y are their respective means and ^2 is the variance…

The mean and variance of 7 observations are 8 and 16, respectively. If one observation 14 is omitted and a and b are respectively the mean…

Let sets A and B have 5 elements each. Let mean of the elements in sets A and B be 5 and 8 respectively and the variance of the elements in…