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AP Stats Flashcards

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14024163648What are 3 ways to reduce margin of error?1. Increase sample size (n) 2. Use a lower level of confidence 3. Reduce σ1
14024163649What statement is used to conclude a confidence interval?I am _____ % confident that the true mean/proportion of (context) is between ______ and ______.2
140241636501 Prop Z Conditions1. SRS 2. Pop10xlgr 3. np ≥ 10 4. n(1-p) ≥ 103
140241636522 Prop Z Conditions1. SRS 2. Pop10xlgr 3. n1p1 ≥ 5 n1(1-p1) ≥ 5 4. n2p2 ≥ 5 n2(1-p2) ≥54
140241636781 Samp T Conditions, 2 Samp T, Paired T Conditions1. SRS (Indep) 2. n≥30 CLT 3. Show data is approx normal. Histogram or NPP5
14024163679Chi-Square GOF Conditions, Chi-Square Homogeneity or Independence Conditions1. SRS 2. Expcts ≥ 5 3.No Expcts < 1 *4*. Matrix B6
14024163680Linear Regression T Test Conditions1. SRS 2. Scatterplot linear + Residual Plot random7
14024163651How do you interpret a confidence interval?If you took all possible samples of size n, the true parameter would fall in about ____% of them.8
140241636531-VarStatsTo find mean, SD, and 5 number summary for a data set9
14024163654LinReg(a+bx)To find the equation for a least squares regression line & to find r and r^210
14024163655binompdfTo find the probability of getting EXACTLY X successes in a binomial setting11
14024163656binomcdfTo find the probability of getting AT MOST X successes in a binomial setting12
14024163657normalcdfTo find an area for an interval in a normal distribution13
14024163658invNormTo find a boundary value in a normal distribution14
14024163659tcdfTo find an area for an interval for a t-distribution15
14024163660invTTo find a boundary value in a t-distribution16
14024163661x^2cdfTo find area for an interval in a x^2 distribution17
14024163671X^2 GOF-TestTo test a claim made about the distribution of a categorical variable (Chi-square GOODNESS-OF-FIT test)18
14024163672X^2-TestTo test a claim made about the distribution of a categorical variable (Chi-square test of homogeneity & Chi-square test of independence)19
14024163673LinRegTTestTo test a claim made about the SLOPE of a POPULATION REGRESSION LINE20
14024306320chi-square goodness of fit test statistic + Homo/Indep21
14024315887Linear Regression T Test Statistic22
140243225951 Proportion Z Test Statistic23
140243268212 Proportion Z Test Statistic24
140243372731 Sample T Test Statistic25
140243413492 Sample T Test Statistic26
14024163646When do you use t*?Means when you don't know the population standard deviation.27
14024347012Paired T Test Statistic27

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