STP 420 Third Exam

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11 Terms

1
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Type I Error

Reject Ho when it is true

  • Probability = α

2
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Type II Error

Fail to reject Ho when it’s false

Probability: β

3
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Increase the power of the test

  • Increase Sample size

  • Increase Significance level (alpha)

  • Decrease population standard deviation

  • Increase difference between hypothetical mean and true mean

4
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Z score confidence interval

𝑥̄±(𝑍×𝑠/√n)

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Z test

One population, one mean

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Non-pooled t

2 independent populations

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Paired t test

Two paired populations

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ANOVA

More than two populations

F table

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P < alpha

Reject Ho

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Non-pooled t test confidence interval

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11
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Paired t test confidence interval

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