Statistics Test...

If the standard deviation of the values $$2,4,6,8$$ is $$2.33$$, then the standard deviation of the values $$4,6,8,10$$ is

The coefficient of range of a set of data is given to be $$\dfrac18$$. Then the ratio of the maximum value in the data to the minimum value is:

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.

Mean deviation can be calculated from _______.

Find the Variance and Standard Deviation of the values $$4, 4, 4, 4, 4, 4$$ using short-cut method.

The variance of a constant is

The sum of squared deviations of a set of $$n$$ values from their mean is

The standard deviation of $$a,a+d,a+2d,...,a+{2}{n}d$$ is

The variance of $$5$$ numbers is $$10$$. If each number is divided by $$2$$, then the variance of new numbers is

If $$y=-8x-5$$ and SD of $$x$$ is $$3$$, then SD of $$y$$ is: