5 JEE Main 2018 Statistics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2018 previous-year questions from the Statistics chapter of Mathematics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Statistics chapter hub.
The mean and the standard deviation S . D . of five observations are 9 and 0 , respectively. If one of the observation…
If the mean of the data: 7,8,9,7,8,7, λ, 8 is 8 , then the variance of this data is
The mean of a set of 30 observations is 75 . If each other observation is multiplied by a nonzero number λ and then eac…
The mean of a set of 30 observation is 75 . If each observations is multiplied by non-zero number λ and then each…
If ∑ i = 1 9 x i − 5 = 9 and ∑ i = 1 9 x i − 5 2 = 45 , then the standard deviation of the 9 it…