Search
Create
Log in
Sign up
Log in
Sign up
AP Statistics Conditions for Inference
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Conditions for Significence Tests and Confidence Intervals
Terms in this set (10)
One Sample T-Test (for mean)
1. σ is unknown
2. SRS
3. observations have a normal distribution
or
n is large (>30)
4. individuals are independent
Two Sample T-Test (for mean)
1. both σs are unknown
2. two independent SRSs
3. populations are normal
or
n1 & n2 is large (>30)
One Sample Z-Test for a Proportion
1. SRS
2. population ≥10n
3. np>10
n(1-p)>10
4. Independence
Two Sample Z-Test for Proportions
1. SRSs
2. independent samples
3. n1 p1 > 10
n1(1-p1)>10
n2 p2>10
n2(1-p2)>10
4. n1<1/10population
n2<1/10population
Regression Inference
1. x and y are linearly related
2. consistent scatter about the regression line
3. residuals are normally distributed
4. data pairs are independent
Chi-Squared Test
1. SRS(s)
2. expected counts >5
3. n<10% of population
T Confidence Interval for Mean
1. σ is unknown
2. SRS
3. population is normal
or
n is large (≥30)
4. Independence
Z Confidence Interval for Population Proportion
1. SRS
2. population ≥10n
3. n p > 10
n(1-p) > 10
4. Independence
Z Confidence Interval for Difference of Population Proportions
1. SRS(s)
2. population >10n
3. independent samples
4. n1 p1 >10
n1(1-p1)> 10
n2 p2 >10
n2(1-p2)> 10
Confidence Interval for Regression of Line Slopes
1.SRS
2. relationship between x and y is linear
3. data pairs are independent
4. residuals are normally distributed
5. scatter about the regression line is consistent
;