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13 Cards in this Set
- Front
- Back
One sample z interval for proportions |
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Finding z* |
2nd VARS 3:invnorm((1-C)/2, 0, 1) |
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Choosing sample size for proportions |
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One sample z interval for means |
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Choosing sample size for means |
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Finding t* |
2nd VARS 4:invT((1-C)/2, n-1) |
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One sample t interval for means |
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Random Condition |
SRS of size n |
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Normal Condition for proportions |
np >= 10 and n(1-p) >= 10 |
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Normal Condition for means |
stated normal, graph is approximately normal, or n >= 30 (Central Limit Theorem) |
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Independent Condition |
all observations are independent AND n =< 1/10N |
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Interpreting a Confidence Level |
In [C%] of samples of the same size |
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Interpreting a Confidence Interval |
We are [C%] confident that our interval from [lower] to [upper] capture the true [proportion or mean in context]. |