Frequency polygon is

Mean deviation of a frequency distribution is least when it is measured from

Which one of the following is NOT a graphical presentation of a frequency distribution?

Deciles and percentiles divide the frequency distribution in (p, q) equal parts. Then (p, q) are

Find median for the following data: Class Interval: 0–20 | 20–30 | 30–40 | 40–50 Frequency: 42 | 25 | 58 | 40

The median of the following distribution is 28.5, the values of x and y are respectively Class Interval: 0–10 | 10–20 | 20–30 | 30–40 | 40–50 | 50–60 Frequency: 5 | x | 20 | 15 | y | 5 where the tota…