DATA CLASSIFICATION

DATA CLASSIFICATION

START

WHAT IS DATA?

WHAT IS USED FOR?

WHAT IS IT CLASSIFICATION?

WHAT ARE THE TYPES OF DATA WE USED?

TYPES OF DATA

QUANTITATIVE

QUALITATIVE

THIS KIND OF DATA CONSIST OF ATTRIBUTES, LABELS, OR NONNUMERICAL ENTRIES.

THIS KIND OF DATA CONSIST OF NUMERICAL MEASUREMENTS OR COUNTS.

QUALITATIVE

QUANTITATIVE

example

The populations of several U.S. cities are shown in the table. Which data are qualitative data and which are quantitative data?

QUALITATIVE

QUANTITATIVE

LEVELS OF MEASURMENTS

NOMINAL

INTERVAL

ORDINAL

RATIO

NOMINAL LEVEL

• QUALITATIVE ONLY
• ARE CATEGORIZED BY NAMES, LABELS, OR QUALITIES
• NO MATHEMATICAL OPERATIONS
• EXS: SOCIAL SECURITY NUMBERS AND NUMBERS ON SPORTS JERSEYS

ORDINAL LEVEL

• QUALITATIVE OR QUANTITATIVE
• DATA CAN BE ARRANGED IN ORDER, OR RANKED

• EXS: RATE OF A PRODUCT AND SATISFACTION SURVEY

example

Which data set consists of data at the nominal level? Which data set consists of data at the ordinal level?

ORDINAL LEVEL

NOMINAL LEVEL

INTERVAL LEVEL

• QUANTITATIVE
• CAN BE ORDERED
• A ZERO ENTRY SIMPLY REPRESENTS A POSITION ON A SCALE, IT´S NOT A TRUE ZERO

RATIO LEVEL

• QUANTITATIVE
• A ZERO ENTRY IS A TRUE ZERO

• A RATIO OF TWO DATA VALUES CAN BE FORMED SO THAT ONE DATA VALUE CAN BE EXPRESSED AS A MULTIPLE OF ANOTHER.

MEASUREMENT SCALES

SUMMARY

ACTIVITY 3

Elaborate a SYNOPTIC TABLE relating ALL the concepts seen in this topic with 4 examples of THE 4 LEVELS OF MEASURMENTS