• Update from your Professor
• Lesson Preparation
• Lesson
  • Central Tendency
  • Relationship between Mean, Median, and Mode
  • Box & Whisker Plots
• Datasets
• Review

Update from
Your Professor

Welcome to your 3rd week!  

Last week we learned about :

• frequency distributions
• range
• frequency
• how histograms, Stem-and-leaf displays, and frequency polygons are constructed
• percentiles and percentile ranks
• how to produce a SAS frequency output

This week we will:

• compute the mean, mode, and median and learn about the relationship between them and which measure of central tendency is best for a given situation
• learn what happens to the mean if a constant is added to or subtracted from every score or if every score is multiplied by or divided by a constant
• examine outliers
• construct a box-and-whisker plot

Each week this section will provide you with any necessary material that will be essential for you completing assignments.

Download the notes, have them read, and be prepared to ask questions:

• Central Tendencies Notes (Word file)
• Check your answers here to Reasons People give for Depression and Are Gamblers more likely to steal than Non-Gamblers? 
  Cumulative Frequency Exercise Key
• For those of you who are unfamiliar with working in Excel, use the following tutorial to help you learn how to calculate some basics:
  Excel Tutorial

Review last week's lesson by completing the Frequencies Review Quiz before moving on to the lesson this week.

Here is the key to last week's Frequency TD.

Continue to the Lesson for This Week