AP Statistics Questions & Answers

AP Statistics Questions & Answers 10% rule - ANSWER: a sample has to be lass than 10% of the whole population 5 number summary - ANSWER: The minumum value, lower quartile, median, upper quartile, and maximum value for a data set. These five values give a summary of the shape of the distribution and are used to make box plots. The five numbers that help describe the center, spread and shape of data alternate hypothesis - ANSWER: , is the hypothesis to be considered as an alternative to the null hypothesis. The null hypothesis will be rejected in favor of the Ha only if the sample data strongly indicate that the null hypothesis is false. area principle - ANSWER: the area occupied by a part of the graph should correspond to the magnitude of the value it represents bar graph - ANSWER: a type of graph in which the lengths of bars are used to represent and compare data in categories A graph that uses horizontal or vertical bars to represent data. bias - ANSWER: Any systematic failure of a sampling method to represent its population Any way that tampers with the accuracy of the sample bimodal - ANSWER: A type of distribution, where there is two or more categories with an equal count or cases and with more cases than the other categories. A distribution with two modes binomial - ANSWER: A two-name naming system. blinding - ANSWER: The practice of concealing group assignment from study subjects, investigators, and/or those who assess subject outcomes, typically in the context of a randomized controlled trial. For ex, study subjects may receive capsules with identical appearance and taste; however, the treatment group receives the active drug, whereas the control group receives the placebo. blinding - ANSWER: The practice of concealing group assignment from study subjects, investigators, and/or those who assess subject outcomes, typically in the context of a randomized controlled trial. For ex, study subjects may receive capsules with identical appearance and taste; however, the treatment group receives the active drug, whereas the control group receives the placebo