t-test in Statistica

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t-test in Statistica
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• Open file adstudy.sta
• Review the varables
• Open t-test for independent samples by variables.
  Try if M01 and M02 do differ.
• Test the difference between M01 and ALL the
  other M varaibles
• Open t-test for independent samples by groups.
  Try if M01 and M02 do differ. Test the
  difference between M01 and ALL the other M
  variables. How many significant differences do
  you observe? What can it mean given the multiple
  comparisons?
• Re-arrrange M01 in such a way that it would fit
  the by variable analysis by GENDER. Find out
  about the GENDER differences in M01. Plot
  boxwhisker plot of group means. Interpret the
  intervals.
• Note that the dataset is NOT about independent
  samples each line belongs to an individual. We
  thus performed the operations as an abstract
  example.
• Perform the analysis for dependent samples
  M01 vs the rest of variables.

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