Section 1.2 Data Classification.

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Presentation transcript:

Section 1.2 Data Classification

Two Types of Data Qualitative 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 trucks Student ID numbers Players numbers on a soccer team Lengths of songs on MP3 player

Four Levels of Measurement 1. 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 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