Statistics Examples

\begin{matrix} Class & Frequency 2 - 10 & 1 11 - 19 & 3 20 - 28 & 9 \end{matrix}

$\begin{array}{c} Class & Frequency \\ 2 - 10 & 1 \\ 11 - 19 & 3 \\ 20 - 28 & 9 \end{array}$

Step 1

Add up all of the frequencies.

1 + 3 + 9 = 13

$1 + 3 + 9 = 13$

Step 2

Find the median of the integers from

1

$1$ to

13

$13$ .

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Step 2.1

Arrange the terms in ascending order.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13

$1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13$

Step 2.2

The median is the middle term in the arranged data set.

7

$7$

7

$7$

Step 3

Starting with

0

$0$ , add the frequencies in the table starting with the first row until you reach

7

$7$ . The median class interval is the corresponding class where the median value falls.

Median Class:

20 - 28

$20 - 28$