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Unit 1 Practitioner’s Work. Photo source: http://davidmlane.com/hyperstat/outlier.jpg. Unit 1 Scenario 1. Complete the course pretest. No need to study, just take the test. Descriptive statistics.  For more information: http://www.openepi.com/Menu/OpenEpiMenu.htm

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unit 1 practitioner s work

Unit 1 Practitioner’s Work

Photo source: http://davidmlane.com/hyperstat/outlier.jpg

Unit 1 Practitioner's Work - Descriptive Statistics

unit 1 scenario 1
Unit 1 Scenario 1
  • Complete the course pretest. No need to study, just take the test.
  • Descriptive statistics.  For more information:http://www.openepi.com/Menu/OpenEpiMenu.htm
  • After some students took the pretest in one class, eCollege calculated descriptive statistics about the test.

Unit 1 Practitioner's Work - Descriptive Statistics

descriptive statistics
Descriptive statistics
  • Descriptive statistics give us information that helps us interpret the data.
  • In this case, we are not comparing this test with another test or this group with another group, we are just describing the behavior of this group (you also did the pretest).
  • Voila, descriptive statistics.

Photo source: http://members.pioneer.net/~mchumor/00images/7203_statistics_cartoon.gif

Unit 1 Practitioner's Work - Descriptive Statistics

scores not from your class
15

14

13, 13, 13, 13

12

11

Mean?

Median?

Mode?

Range?

Scores (not from your class)

Photo source: http://www.sarkisian.net/sc705/book.jpg

Unit 1 Practitioner's Work - Descriptive Statistics

descriptive statistics1
Descriptive Statistics
  • Highest Score: 15 (83%)
  • Lowest Score: 11 (61%)
  • Range: 4 (Lowest to highest score.)
  • Mean: 13 pts. (Average)
  • Median: 13 pts. (Midpoint)Mode: 13 pts.
  • Number of Respondents: 8
  • Points Possible: 18 pts.

Unit 1 Practitioner's Work - Descriptive Statistics

imagine that we had 100 students take this pretest
Imagine that we had 100 students take this pretest.
  • A bunch of scores might fall in the middle, with very few scores at very high and very low 9-10 or 1-2.
  • This creates a bell curve effect (see attachment).

Photo source: http://www.ahrq.gov/about/annualmtg07/0926slides/middleton/Middleton-23.jpg

Unit 1 Practitioner's Work - Descriptive Statistics

slide7
The SD deviation describes what the data looks like.
  • M = mean or average. S or SD -1 would be one standard deviation below the mean, +1 would be one standard deviation above the mean, and so on.

Unit 1 Practitioner's Work - Descriptive Statistics

slide8

End

Thanks for taking the time to review this information!

Photo source: http://fc.bullis.org/~faith_Darling/FOV2-0001D744/S01105998-01105998.0/PieChartCartoon.gif

Unit 1 Practitioner's Work - Descriptive Statistics