Test: Statistics- 2 - JEE MCQ

If a, b, c be any three positive numbers, then the least value of  (a + b + c) 

The median of the data 13,14,16,18,20,22 is

If the two lines of regression are at right angles, then ρ(X,Y) is equal to

If COV(X,Y) = 0, then the two lines of the regression are

If the variance of the data is V, then its S.D. is

If the two lines of regression are y = 3x – 5 and y = 2x – 4 , then ρ(X,Y) is equal t

If the median = (mode + 2 mean) μ, then μ is equal to

If mean = (3 median – mode) x , then the value of x is

Least square lines of regression give best possible estimates, when ρ(X,Y) is equal to

Quartile deviation is nearly equal to

For a symmetrical distribution Q₁ = 20 and Q₃. = 40. The median of the data is

Which of the following is not a measure of dispersion ?

The mean and S.D. of 1,2,3,4,5,6 is

The range of the following set of observations 2,3,5,9,8,7,6,5,7,4,3 is

Which of the following, in case of a discrete data, is not equal to the median?

Mean deviation from the mean for the observations – 1, 0 ,4 is

The mean of 50 observations is 36, if two observations are 30 and 42 are deleted , then the mean of the remaining observations is

For a bivariate frequency distribution b_yx > 1, then b_yx is

A man tavels at a speed of 20 km/hour and then return at a speed of 30 km/hour. His average speed of the whole journey is

In a group of students, mean weight of boys is 80 kg and mean weight of girls is 50kg.If the mean weight of all the students taken together is 60kg, then the ratio of the number of boys to that of the girls is

If the mean of 3,4,x,7,10, is 6, then the value of x is

For a normal distribution, we have