1

JEE Main 2013 (Offline)

MCQ (Single Correct Answer)

+4

-1

All the students of a class performed poorly in Mathematics. The teacher decided to give grace marks of 10
to each of the students. Which of the following statistical measures will not change even after the grace
marks were given?

2

AIEEE 2012

MCQ (Single Correct Answer)

+4

-1

Let x

_{1}, x_{2},........., x_{n}be n observations, and let $$\overline x $$ be their arithematic mean and $${\sigma ^2}$$ be their variance.**Statement 1 :**Variance of 2x_{1}, 2x_{2},......., 2x_{n}is 4$${\sigma ^2}$$.**Statement 2 :**: Arithmetic mean of 2x_{1}, 2x_{2},......, 2x_{n}is 4$$\overline x $$.3

AIEEE 2011

MCQ (Single Correct Answer)

+4

-1

If the mean deviation about the median of the numbers a, 2a,........., 50a is 50, then |a| equals

4

AIEEE 2010

MCQ (Single Correct Answer)

+4

-1

For two data sets, each of size 5, the variances are given to be 4 and 5 and the corresponding
means are given to be 2 and 4, respectively. The variance of the combined data set is

Questions Asked from Statistics (MCQ (Single Correct Answer))

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