The marks obtained (out of $50$ marks) by $30$ students in a mathematics test are as given below:
$37, 22, 35, 42, 10, 16, 31, 22, 20, 27$
$27, 20, 31, 40, 35, 40, 27, 16, 47, 22$
$40, 22, 35, 20, 37, 20, 37, 47, 42, 31$
Represent this data in a frequency distribution table.

$A$ total of $25$ patients admitted to a hospital are tested for blood sugar levels $(mg/dl)$ and the results obtained are as follows:
$\begin{array}{lllll} 87 & 71 & 83 & 67 & 85 \\ 77 & 69 & 76 & 65 & 85 \\ 85 & 54 & 70 & 68 & 80 \\ 73 & 78 & 68 & 85 & 73 \\ 81 & 78 & 81 & 77 & 75 \end{array}$
Find the mean,median,and mode $(mg/dl)$ of the above data.

The facts or figures,which are numerical or otherwise,collected with a definite purpose are called .......

Find the mean and the median of the observations: $72, 15, 28, 31, 32, 51, 44, 43$ and $62$.

Following is the frequency distribution of total marks obtained by the students of different sections of Class $VIII.$

Marks	$100-150$	$150-200$	$200-300$	$300-500$	$500-800$
Number of students	$60$	$100$	$100$	$80$	$180$

Draw a histogram for the distribution above.

There are $50$ numbers. Each number is subtracted from $53$ and the mean of the numbers so obtained is found to be $-3.5$. The mean of the given numbers is: (in $.5$)