Lesson 8: Testing Significance of Slope and Overall Model (t-test and F-test)

February 16, 2017

Thu, Feb 16

Review:

• Correlation
• Linear Regression

Presentation:

• t-test of slope:
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• F-test of overall model:

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• Data Set 3 in Sheets

Activity:

• Calculate t-test of slope and F-test for Data Sets 1 and 2 (by hand)
  • Data set 1: {(3,5), (5,8), (8,11), (12,10)}
  • Data set 2: {(50,12), (60,15), (70,20), (80,30)}
• Use this data set:  East Pueblo RE Sales 2014-2016 (from last time)
  • Find the necessary values from your Regression Output
  • Calculate t-test of slope and F-test for these data (by hand)
  • Compare to t-test and F-test values on Regression Output (there may be differences due to rounding error)
• Submit calculations in class