Define bivariate data.

Identify the midpoint of the class interval if the lower limit and the upper limit of a class are $25$ and $29$ respectively,

Represent the union of two sets by Venn diagram for each of the following.

$X=\{x | x$ is a prime number between $80$ and $100\}$

$Y=\{y | y$ is an odd number between $90$ and $100\}$

Identify the midpoint of the class interval if the lower limit and the upper limit of a class are $35$ and $39$ respectively,

If the lower limit and the upper limit of a class are $10$ and $19$ respectively. Find the mid point of the class?

In case of an even number of observations which of the following is median?

If the lower limit and the upper limit of a class are 10 and 19 respectively, the midpoint of the class is _____

Identify the midpoint of the class interval if the lower limit and the upper limit of a class are $21$ and $25$ respectively,