AP Statistics Interpretations Flashcards

6623380269	describing and comparing distribution	center, shape, spread, context, compare (if necessary)	0
6623382649	z-score	the number of standard deviations above or below the mean	1
6623383356	correlation (r)	the strength and direction of a linear association between two quantitative variables	2
6623384771	coefficient of determination (r^2)	the fraction of variation in the y-values (in context) explained by the LSRL of y on x (in context)	3
6623387664	slope of LSRL (b)	as the x-variable increases by 1 unit, the y-variable is predicted to increase/decrease by an average of b y-units	4
6623391489	y-intercept of LSRL (a)	when x is 0 x-units, the y is predicted to be a y-units	5
6623459998	standard deviation of the residuals (s)	the average distance of each observed y-value from the LSRL (the average prediction error)	6
6623462120	standard deviation	the average distance of each observation from the mean	7
6623463036	expected value	if you were to repeat the random process many times, the mean number of ___________ (variable) would be about _______ (expected value) in the long run.	8
6623475752	probability	the long term relative frequency of an event (in context) occurring	9
6623478198	independent events	two events that have no effect on each other; P(A\|B) = P(A), P(B\|A) = P(B)	10
6623480421	mutually exclusive events	disjoint events; two events that cannot occur at the same time; P(A and B) = 0	11
6623482472	confidence interval	We are ____% confident the interval between _____ and ____ will capture the true ____________________________.	12
6623483554	confidence level	In the long run, about ____% of intervals calculated from samples of the same size from the same population will capture the true ______________________________________.	13
6623486519	p-value	If the null is true (in context), the probability of obtaining results at least as extreme as the sample is _________ (p-value).	14
6623490813	if the p-value is less than alpha,	we reject the null and accept the alternative. There is evidence of the alternative (in context).	15
6623493268	if the p-value is greater than alpha,	we fail to reject the null and fail to accept the alternative. There is no evidence of the alternative (in context).	16
6623494320	Type 1 Error	rejecting a true null; We rejected the null and accepted the alternative when the null was actually true; Describe a consequence in context.	17
6623497699	Type II Error	failing to reject a false null; We failed to reject the null and did not accept the alternative when the null was actually false; Describe a consequence in context.	18
6623500236	power	The probability of rejecting the null given that the alternative is true (in context) is _______(power).	19