Descriptive Sta...

$$\Uparrow \quad \Uparrow\quad  \Uparrow \quad \Uparrow$$  Number represented by figure is ____, if each symbol represents 5 houses.

.

Variance of the distribution $$73, 77, 81, 85,..., 113$$ is

Number of TV sets sold in the year 1980 is

A symbol is used to represent $$10$$ flowers. Number of symbols to be drawn to show $$60$$ flowers is ___

$$1000$$ TV sets were sold in the year

The line graph shows the monthly expenditure of Vasu family. The total expenditure over the first $$3$$ months is

The variance of first n natural numbers is

The formula of standard deviation of a grouped frequency distribution is