goals

Find the Mean Deviation about median for the following data :

Class | 0 - 10 | 10 - 20 | 20 - 30 | 30 - 40 | 40 - 50 | 50 - 60 | 60 - 70 | 70 - 80 |

frequency | 5 | 8 | 7 | 12 | 28 | 20 | 10 | 10 |

Find the mean $$S.D$$ of $$1,2,3,4,5,6$$.

Find the median and mode of the following data.

$$28$$ , $$15$$ , $$40$$ , $$25$$ , $$16$$ , $$28$$ , $$32$$ , $$36$$ , $$42$$ , $$16$$ , $$19$$ , $$23$$

$$28$$ , $$15$$ , $$40$$ , $$25$$ , $$16$$ , $$28$$ , $$32$$ , $$36$$ , $$42$$ , $$16$$ , $$19$$ , $$23$$

What is the mean value of below numbers?

$$2,5,6,8,7,5,4,3,5,2,2,$$

$$2,5,6,8,7,5,4,3,5,2,2,$$

The sum of squares of deviations for $$10$$ observations taken from mean $$50$$ is $$250 $$. Then Co-efficient of variation is