The most stable measure of central tendency is

Find the median of the numbers $6, 14, 12, 8, 10, 9, 11$.

The mean of a set of numbers is $\bar{x}$. If each number is multiplied by $\lambda$,then the mean of the new set is

The arithmetic mean of the following discrete data $12, 14, 20, 23, 25, 32$ is given by

The $A.M.$ of a $50$ set of numbers is $38$. If two numbers of the set,namely $55$ and $45$,are discarded,the $A.M.$ of the remaining set of numbers is

If the mean of the numbers $27, 31, 89, 107, 156$ is $82$,what is the mean of the numbers $130, 126, 68, 50, 1$?