Confidence intervals Flashcards

1
Q

What is a CI?

A

Likelihood a population mean lies within certain boundaries

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2
Q

Calculate lower bound

A

mean - (1.96 x SE)

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3
Q

Calculate upper bound

A

mean + (1.96 x SE)

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4
Q

If there are more than 30 ppts which table do you use? CI

A

Z tables

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5
Q

If there are less than 30 ppts which table do you use? CI

A

T tables

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6
Q

How large should a CI be?

A

Smaller is better as more informative

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