Question

Ranking

. What is a percentile?

What does a score of the 80th percentile mean?

What is quartile?

. Explain what information the 5-number summary gives you.

How do we graphically display the 5-number summary?

Answer 1

Ranking is the ordering of the items or observations based on the criterion.

Percentile is the value used for indicating how much percentage of observations are below that value. Percentiles divide the observations in equal 100 parts.

The score of 80th percentile mean there are 80% observations are below that value.

The quartiles are the three specific values that divide entire data into four equal parts. These quartiles are indicated by Q1, Q2 (median), and Q3.

The 5-number summary provides that information about the five statistical measures such as minimum, first quartile, median or second quartile, third quartile, and maximum.

Graphically, we display the 5-number summary in the order of the following values:

Minimum

Q1

Median

Q3

Maximum