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

Find the mean of the following frequency distribution:

$x_i$	$3$	$6$	$9$	$12$
$f_i$	$1$	$2$	$3$	$4$

Let $x_1, x_2, \ldots, x_{11}$ be $11$ distinct positive integers. If we replace the largest of these integers by the median of the other $10$ integers,then:

Which one of the following measures of central tendency is the most suitable for evaluating the intelligence of students based on their marks?

If the mean of five observations $x, x + 2, x + 4, x + 6$,and $x + 8$ is $11$,what is the mean of the last three observations?

The mean of discrete observations $y_1, y_2, \ldots, y_n$ is given by: