Find the mean deviation of 2, 4, 5 and 9

Find the median of 4, 1, 4, 1, 0, 4, 4, 2 and 0

What is the mean of the data $t,2t-1,t-2,2t-1,4t\text{ and }2t+2$

The bar chart above shows the number of times the words a, and, in, it, to appear in the paragraph in a book. What is the ratio of the least frequent word to that of the most frequent word.

On a pie chart, there are six sectors of which four are 30^o, 45^o, 60^o, 90^o and the remaining two angles are in ration 2:1. Find the smaller angles of the remaining two angles

What is mean deviation of 3, 5, 8, 11, 12 and 21?

If 5, 8, 6and 2 occur with frequencies 3, 2, 4 and 1, respectively, find the product of the modal and median number

The cumulative frequency for $5\le x\le 12$from the distribution above is

The pie chart above illustrate the amount of private time a student spends in a week studying various subjects. Find the value of k

The histogram above represented the weight of students who travelled out of their school for an examination. How many people made the trip.