Stats - t and 2 distributions. Standard Deviation...

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1 Population Hypothesis Test Flow Chart Proportions Variance What are we testing? Is σ known? YES n s x z μ = + < < n s z x n s z x 2 2 α NO n s x t = + < < n s t x n s t x 2 2 Does the normal approx. apply? Mean Top formula is the test statistic. The , , p are the obtained from the alternative hypothesis. It is what you are testing the population parameter against. Bottom formula is the confidence interval formula. The , , p are not values but remain symbols. Note: The confidence interval contains all the values used in the test statistic. Degrees of Freedom, d.f., is n-1 . D.f. is needed for the chart values obtained using
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Unformatted text preview: t and 2 distributions. Standard Deviation Confidence Interval: Take the square root for the confidence interval obtained using the variance. YES, n x z = + &lt; &lt; n z x n z x 2 2 NO Is ? 30 n YES n pq p p z = + &lt; &lt; n q p z p p n q p z p 2 2 NO We will not discuss. 2 2 2 ) 1 ( s n = 2 2 1 2 2 2 2 2 ) 1 ( ) 1 ( &lt; &lt; s n s n...
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