Understanding Research Results - Statistical Inference
Inferential Statistics
Mean difference = true difference
Probability levels
Hypothesis testing
Hypothesis Testing
Statement regarding how two variables are related
Null Hypothesis: µ0 = µ 1
Research Hypothesis: µ0 ≠ µ 1
Statistical Tests
t-test and F-test
t-test is appropriate when you have 1 IV with 2 levels
Ratio
Numerator: Mean difference
Denominator: Random error
Degrees of Freedom
Divisor used to compute the estimated population variance
- (k – 1)
One-tailed Test
aka Directional Test
Two-tailed Test
aka Non-directional Test
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