AP Stats Flashcards

14024163648	What are 3 ways to reduce margin of error?	1. Increase sample size (n) 2. Use a lower level of confidence 3. Reduce σ	1
14024163649	What statement is used to conclude a confidence interval?	I am _____ % confident that the true mean/proportion of (context) is between ______ and ______.	2
14024163650	1 Prop Z Conditions	1. SRS 2. Pop10xlgr 3. np ≥ 10 4. n(1-p) ≥ 10	3
14024163652	2 Prop Z Conditions	1. SRS 2. Pop10xlgr 3. n1p1 ≥ 5 n1(1-p1) ≥ 5 4. n2p2 ≥ 5 n2(1-p2) ≥5	4
14024163678	1 Samp T Conditions, 2 Samp T, Paired T Conditions	1. SRS (Indep) 2. n≥30 CLT 3. Show data is approx normal. Histogram or NPP	5
14024163679	Chi-Square GOF Conditions, Chi-Square Homogeneity or Independence Conditions	1. SRS 2. Expcts ≥ 5 3.No Expcts < 1 4. Matrix B	6
14024163680	Linear Regression T Test Conditions	1. SRS 2. Scatterplot linear + Residual Plot random	7
14024163651	How 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
14024163653	1-VarStats	To find mean, SD, and 5 number summary for a data set	9
14024163654	LinReg(a+bx)	To find the equation for a least squares regression line & to find r and r^2	10
14024163655	binompdf	To find the probability of getting EXACTLY X successes in a binomial setting	11
14024163656	binomcdf	To find the probability of getting AT MOST X successes in a binomial setting	12
14024163657	normalcdf	To find an area for an interval in a normal distribution	13
14024163658	invNorm	To find a boundary value in a normal distribution	14
14024163659	tcdf	To find an area for an interval for a t-distribution	15
14024163660	invT	To find a boundary value in a t-distribution	16
14024163661	x^2cdf	To find area for an interval in a x^2 distribution	17
14024163671	X^2 GOF-Test	To test a claim made about the distribution of a categorical variable (Chi-square GOODNESS-OF-FIT test)	18
14024163672	X^2-Test	To test a claim made about the distribution of a categorical variable (Chi-square test of homogeneity & Chi-square test of independence)	19
14024163673	LinRegTTest	To test a claim made about the SLOPE of a POPULATION REGRESSION LINE	20
14024306320	chi-square goodness of fit test statistic + Homo/Indep		21
14024315887	Linear Regression T Test Statistic		22
14024322595	1 Proportion Z Test Statistic		23
14024326821	2 Proportion Z Test Statistic		24
14024337273	1 Sample T Test Statistic		25
14024341349	2 Sample T Test Statistic		26
14024163646	When do you use t*?	Means when you don't know the population standard deviation.	27
14024347012	Paired T Test Statistic		27