What is the first quartile, q1, of the data set?
{23, 28, 28, 36, 56, 60, 61, 65, 70}
enter your answer in the box.
q1 =

Step-by-step explanation:

Given data :-{23, 28, 28, 36, 56, 60, 61, 65, 70}

The number of observations n =9

We know that the position of median is given by :-

Now, for n=9,

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign