Measures of Dis...

If a constant value $$40$$ is subtracted from each observation of a set, the mean of the set is __________.

Which measure is based on only the central fifty percent of the observations?

An index is at 100 in 1991. It rises 5% in 1992, falls 6% in 1993,falls 5% in 1994, rises 4% in 1995 and 7% in 1996.The index numbers for all these years with 1991 as base are _______.

If each value of a series is multiplied by $$7$$, the median of the coded value is _______.

The standard deviation is usually denoted by Greek letter.

Which of the following represents median?

If each observation of a set is multiplied by $$5$$, the mean of the new setoff observations ______.

Which one is an absolute measure of dispersion?

The mode of the following observations is $$10, 19, 22, 16, 15, 18, 20, 18, 14, 18, 23$$

If the A.M of a set of observations is $$9$$ and its G.M is $$6$$. Then the H.M of the set of observations is ____.