STATISTICS

CONTENT

1. Data Presentation (Revision)
2. Range of a Set of Values

DATA PRESENTATION

RANK-ORDERED LIST

Rank order means arranging data values from the highest to the lowest.

Example

Some JCSE students scored these grades in a revision test: C, B, D, A, C, C, E, B, D, F, B, D, E, C, A, C, D, B. Represent the data in rank order.

Solution

Here is the rank order list from A to F:

A, A, B, B, B, B, C, C, C, C, C, D, D, D, D, E, E, F

FREQUENCY TABLE

A frequency table shows the number of times a value appears. A frequency table can be prepared for a given data set either vertically or horizontally.

Example

In a class of 30 students seated in six rows of five students each, the class monitor records the following dates of births, row by row.

\(\begin{array}{col1col2…coln}Wed. & Thu. & Sun. & Tue. & Fri. \\Mon. & Wed.