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 |
AP Statistics Interpretations Flashcards
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