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Differences Amongst Samples. Sampling Error – differences between two samples that are attributed to random error or chance Significant Differences – differences between two samples that are attributed to an outside factor such as an IV . Decisions.

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differences amongst samples
Differences Amongst Samples
  • Sampling Error – differences between two samples that are attributed to random error or chance
  • Significant Differences – differences between two samples that are attributed to an outside factor such as an IV
decisions
Decisions
  • There are four possible outcomes after conducting a statistical test
correct decisions
Correct Decisions
  • When the null is retained we expect the following to be the case
  • When the null is rejected we expect the following to be the case
type 1 error
Type 1 Error
  • A type 1 error occurs when two samples appear to be different, but are actually from the same population
type 2 error
Type 2 Error
  • Type 2 errors occur when two samples appear to be from the same population, but are actually from different populations