Question

Which formula would you use to locate the jth decile for an individual (ungrouped) data set with n observations?

Options

• \[j\times\frac{n}{10}\text{th observation}\]

• \[j\times n\text{th observation}\]

• \[\frac{n}{j\times10}\text{th observation}\]

• \[j\times\frac{n+1}{10}\text{th observation}\]

Answer 1

\[j\times\frac{n+1}{10}\text{th observation}\]

Explanation:

For individual data, the position of a decile is found using \[j\times\frac{n+1}{10}\text{th observation}\] observation.​