Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
BITSAT2012MathematicsStatisticsActual

If sample A contains 100 observations 101,102, 200 and sample B contains 100 obsections 151,152, 250, then ratio of variance v _ A / v _ B =

Options

  1. A1
  2. B9 4
  3. C4 9
  4. D2 3

Correct answer

A. 1

Step-by-step solution

_ x ²= d ² i n But both A and B have 100 observations, then both the sample A and B have same standard deviation and the same variance. Hence, V _ A V _ B =1

Practice Statistics on Quantrex Academy →

More from Statistics

If the variance of the data 2,3,5,8,12 is ^2 and the mean deviation from the median for this data is M , then ^2- M = 2024The mean of n items is X . If the first item is increased by 1 , second by 2 and so on, the new mean is : 2024The variance of 20 observations is 5 . If each observation is multiplied by 2 , then the new variance of the resulting observation is 2024If the function f(x) , defined below, is continuous on the interval [0,8] , then f(x)= array cc x^2+a x+b & , 0 x 2 3 x+2, & 2 x 4 2 a x+5 b, & 4 x 8 array . 2024The standard deviation of 5 scores 1,2,3,4,5 is a . The value of ' a ' is 2023Find the mean deviation about the mean for the data 4,7,8,9,10,12,13,17 2023The mean of five observations is 4 and their variance is 5.2 . If three of these observations are 1 , 2 and 6 , then the other two are 2022The arithmetic mean of a set of observation is X ¯ . If each observation is divided by α and increased by 10 , then the mean of the new series is 2018 Full Statistics list All BITSAT PYQs