1 / 23

Elementary Statistics Picturing the World

Elementary Statistics Picturing the World. Data Classification. 1.2 Data Types and Levels of Measurements. Qualitative data – consist of values that describe qualities or non-numerical (i.e. brand names, letter grades, area codes, social security numbers, gender)

louis
Download Presentation

Elementary Statistics Picturing the World

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Elementary StatisticsPicturing the World Data Classification

  2. 1.2 Data Types and Levels of Measurements • Qualitative data – consist of values that describe qualities or non-numerical (i.e. brand names, letter grades, area codes, social security numbers, gender) • Quantitative data – consist of values representing counts or measurements with which you can make meaningful calculations (i.e. IQ scores, percentage grades, price of cars)

  3. 1.2 Data Types and Levels of Measurements • Four Levels of Measurement: • Nominal – data consisting of names, labels, or categories only. The data are qualitative and can not be ranked or ordered • Ordinal –qualitative or quantitative data that can be arranged in some order. It generally does not make sense to do computations with ordinal data. • Interval – quantitative data which intervals are meaningful, but ratios are not. Data at this level have an arbitrary zero point. • Ratio – quantitative data which both intervals and ratios are meaningful. Data at this level have a true zero point.

  4. 1.2 Data Types and Levels of Measurements • Four Levels of Measurement: • Nominal –Flavors, gender, type of car you drive, occupation, social security numbers • Ordinal – Movie ratings ( 3 stars vs. 2 stars), BCS College Football Rankings, the order of runners finishing a race • Interval – temperature (55 degrees is more than 11 degrees, but 55 degrees is not necessarily 5 times hotter than 11 degrees because 0 does not represent no temperature) • Ratio – distances (10 miles is twice 5 miles, and 0 miles means no distance), salary, age

  5. 1.2 Data Types and Levels of Measurements

  6. 1.2 Data Types and Levels of Measurements Eye color on a dating survey? • Qualitative • Quantitative

  7. 1.2 Data Types and Levels of Measurements Scores on a multiple choice exam? • Qualitative • Quantitative

  8. 1.2 Data Types and Levels of Measurements Flavors of ice cream? • Qualitative • Quantitative

  9. 1.2 Data Types and Levels of Measurements College majors? • Qualitative • Quantitative

  10. 1.2 Data Types and Levels of Measurements Weights of trucks? • Qualitative • Quantitative

  11. 1.2 Data Types and Levels of Measurements Incomes of college graduates? • Qualitative • Quantitative

  12. 1.2 Data Types and Levels of Measurements The numbers on the shirts of a girl’s soccer team? • Qualitative • Quantitative

  13. 1.2 Data Types and Levels of Measurements Student rankings of cafeteria food: excellent, good, fair, poor? • Nominal • Ordinal • Interval • Ratio definite order

  14. 1.2 Data Types and Levels of Measurements Weights of wrestlers? • Nominal • Ordinal • Interval • Ratio true zero point

  15. 1.2 Data Types and Levels of Measurements Calendar years of historic events, such as 1776, 1945, 2001? • Nominal • Ordinal • Interval • Ratio because dates have no meaningful ratios and zero does not represent beginning of time

  16. 1.2 Data Types and Levels of Measurements Numbers on uniforms? • Nominal • Ordinal • Interval • Ratio no ordering

  17. 1.2 Data Types and Levels of Measurements Temperatures on the Celsius scale? • Nominal • Ordinal • Interval • Ratio because temperature has no meaningful ratios and zero degrees does not mean “no heat”

  18. 1.2 Data Types and Levels of Measurements Runner’s times in the Boston Marathon? • Nominal • Ordinal • Interval • Ratio true zero point

  19. 1.2 Data Types and Levels of Measurements Data that can be classified according to color? • Nominal • Ordinal • Interval • Ratio

  20. 1.2 Data Types and Levels of Measurements The final grades (A, B, C, D, and F) for students in a Probability & Statistics course? • Nominal • Ordinal • Interval • Ratio

  21. 1.2 Data Types and Levels of Measurements A list of Zip Codes? • Nominal • Ordinal • Interval • Ratio

  22. 1.2 Data Types and Levels of Measurements The daily temperatures (in degrees Fahrenheit) on five randomly selected days are 22, 21, 31, 36, 21? • Nominal • Ordinal • Interval • Ratio

  23. 1.2 Data Types and Levels of Measurements Social Security Numbers? • Nominal • Ordinal • Interval • Ratio

More Related