1. By: Michael Mack, Ana Meneses and Zhane’ Fleming

2. Words to Know  Qualitative Variables  Quantitative Variables  Discrete Variables  Continuous Variables  Nominal Level of Measurements  Ordinal Level of Measurements  Interval Level of Measurements  Ratio Level of Measurements  Measurement Scales

3. Qualitative Variables  Variables that can be placed into distinct categories according to some characteristics or attribute Ex: The gender (male or female) then the variable gender is qualitative, these variables are religious preference and geographic locations

4. Quantitative Variables  Numerical and can be ordered or ranked Ex: Variable ages are numerical (height, weight, and body temperature)

5. Discrete Variables  They can be assigned variables such as 0, 1, 2 and 3 and are said to be countable Ex: Number of children in family, number of student in classroom, and the number of calls received by a switch board operator each day for a month.

6. Continuous Variables  Can assume an infinite number of values in an interval between any two specific values Temperature for example is a continuous variable, they often include fractions, decimals and measuring

7. Measurement Scales  A type of classifications that tells how variables are categorized, counted or measured There are 4 types…………

8. Type one: NOMINAL  “ Nominal Level of Measurements” classified data into mutually exclusive categories in which no order or ranking can be imposed on the data Ex: Male and female, political parties

9. Type 2: ORDINAL  “Ordinal Level of Measurements” classified data into categories that can be ranked, however precise differences between the rank do not exists Ex: From students evaluations, guessed speakers might be ranked as superior, average, or poor Ex: People classified on their build or grades

10. Type 3: INTERVAL  “Interval Level of Measurements” ranked data and precise differences between unit of measure do exist, however there is no meaningful zero. Ex: IQ and temperature

11. Type 4: RATIO  “Ratio Level of Measurements” possesses all the characteristics of interval measurements in there exists a true zero. In addition true ratios exists when the same variables is measure on two different members of the population Ex: Measure height, weight, area, and number of phone calls recieved

12. Questions???  What are the 4 Measurement Skills?  What is Qualitative?  True or False: Is it true that nominal can be classified into one category?  True or False: Is Discrete one of the 4 measurements?  True or False: in Ratio Level a true zero exisits