Data Classification

Two Types of DataQualitative Data: consists of attributes,

labels, or non-numerical entries.Quantitative Data: Consists of

numerical measurements or counts.

EX: Is the data Qualitative of Quantitative?

Carrying capacities of pick up trucksStudent ID numbersPlayers numbers on a soccer teamLengths of songs on MP3 player

Four Levels of Measurement1. Nominal Level: Qualitative data

organized using names, labels, or qualities. No mathematical computations are made at this level.

2. Ordinal Level: Qualitative or Quantitative data arranged in order (ranked), but differences between the categories are not meaningful.

3. Interval Level: Quantitative data that is ordered. Meaningful differences between data entries can be calculated. A zero entry represents a position on a scale, and not an inherent zero.

4. Ratio Level: Quantitative data, similar to interval level, but a zero entry means an inherent zero. In other words, zero means NONE.

EX: Determine the type of data & the level of measurement.19. The top 5 teams in the final football

college poll released in Jan 2010 are: 1. Alabama 2. Texas 3. Florida 4. Boise

St 5. Ohio St

24. The average ticket prices for 10 Broadway shows in 2009 are:

$149 $128 $124 $91 $96 $106 $112 $95 $86 $74