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33 Cards in this Set
- Front
- Back
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T ts formula |
xbar - mnull -------------------- s --- square root n |
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xbar - mnull -------------------- s --- square root n |
Tts formula |
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type 1 error |
reject null, but shouldnt have -reject null so support alternate |
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reject null, but shouldnt have |
type 1 |
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when 1 proportion m test it is a _____ test statistic test |
T |
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when states the success rate % it is a |
1 proportion z test USE Z ts |
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in an equation that has whatever rate % that is the |
p hat |
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defect rate is 5.9% is |
p hat = .059 and x = .059 x n |
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in proportion Z test normality condition is |
n(P) is greater than or equal to 10 and n(1-P) Is greater than or equal to 10 -P IS NULL |
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Zts equation |
Phat - Po ---------------- square root Po ( 1- Po) -------------- n |
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whatever rate for a sample is |
p hat |
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when asks for percent of population it is |
population proportion test USE Z ts |
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type 2 error |
dont reject null, should have rejected potentially support claim potentially reject claim |
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when asking difference use |
Md |
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Md T ts equation |
dbar ------------ sx ---- square root n |
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dbar ------------ sx ---- square root n |
Md T ts equation |
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Md conditions (differnce equation) |
1. # of differences are SRS 2. differences are normal 3. Population consists of at least 10x # of differences |
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1. # of differences are SRS 2. differences are normal 3. Population consists of at least 10x # of differences |
Md conditions (difference equation) |
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when multiple frequencies per number |
put number in L1 and frequency of occurances in L2 |
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ts for 2 pop M test |
Tts |
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Tts for 2 pop M test equation |
(xbar1 - xbar2) ----------------------- square root S1^2 over n1 + S2^2 over n2 |
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(xbar1 - xbar2) ----------------------- square root S1^2 over n1 + S2^2 over n2 |
Tts for 2 pop M test equation |
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in 2pop M test if states exact number of differences put that # instead of |
xbar1 - xbar2 |
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when 2 xbars are given its |
2 samp T test aka 2 M test |
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if sigmas equal each other |
it is pooled |
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Phat C equation= |
x1 + x2 ------------ n1 + n2 |
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x1 + x2 ------------ n1 + n2 |
Phat C equation |
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when you are givven n and x of two proportions it is |
2 population proportion and get p hat |
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normality condition of 2 proportion z test or population test |
get Phat C n1(Phat C) is greater than or equal to 5 n1(1-Phat C) is greater tha or equal to 5 n2(Phat C) is greater than or equal to 5 n2(1-Phat C) is greater than or equal to 5 |
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Zts equation for 2 population proportion test |
phat1 - phat2 ---------------------- square root phat C (1-phat C)(1/n1+1/n2) |
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phat1 - phat2 ---------------------- square root phat C (1-phat C)(1/n1+1/n2) |
Zts equation for 2 population proportion test |
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observation study if |
we did not impose treatments |
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can you conclude that whatever causes an increased risk of whatever |
no doesnt cause but it is associated |
