AP Statistics- Part V Exam Test With Comprehensive Questions And Answers.

ρ - correct answer true proportion υ - correct answer Population mean ^p; sample proportion - correct answer The number of successes divided by the number of trials (n) SD(^p) - correct answer √(pq/n) Normal Model (sampling distribution model) - correct answer If we draw repeated random samples of the same size, n, from some population and measure the proportion we get for each sample, then the collection of these proportions will pile up around the underlying population proportion, p, in such a way that a historgram of the sample proportions can be modeled by ______. Two assumptions for the distribution of sample proportions. - correct answer 1. The sampled values must be independent of each other. 2. the sample size, n, must be large enough. 10% condition - correct answer If samling has been made without replacement, then the sample size, n, must be no larger than 10% of the population. Success/Failure condition - correct answer The sample size has to be big enough so that both (np) and (nq) are greater than 10. Central Limit Theorem - correct answer The means of repeated saples will tend to follow a Normal mode as the sample size grows, even if we sample from a skewed or bimodal population. Standard deviation parameter of the sampling distribution model for the mean, ȳ, SD(ȳ). - correct answer Only goes down by the square root of the sample size. (ϑ/√n) Random Sampling condtion - correct answer The values must be sampld randomly or the consept of a sampling distribution makes no sense. Independence Assumption (10% condition) - correct answer The sampled values must be mutually independent. There's no way to check in general whether the observations are independent. However, when the sample is drawn without replacement (usually the cse), you shuld check the _____-sampe size, n, is no moe than 10% of the population. stadard error - correct answer whenever we estimate the standard deviation of a sampling distribution using statistics found from the sata. for ^p: =√(p)(q)/n. for ȳ: = s/√n. statistic - correct answer Random quantity; one instance something that happened for a particular random sample. sampling distribution model - correct answer Different random samples give different values for a statistic. The sampling distribution model shows the behavior of the statistic over all the possible values. sampling distribution model for a proportion - correct answer If assumptions of independence and random sampling are met, and we expect at least 10 successes and 10 failures, then the sampling distribution of a proportion is modeled by a Normal model with a mean equal to the true proportion value, p, and a standard deviation equal to √(pq/n) sapling distribution model for a mean - correct answer If the assumptions of independence and random sampling are met, and the sample size is large enough, the sampling distribution of the sample mean is modeled by a Normal model with a mean equal to the population mean, υ, and standard deciation equal to ϑ/√n. variance - correct answer The ______ of the sum or difference of two indep