2023 Final Exam Test Questions

Left-tailed test {Ans: use area to LEFT of test statistic}empty set {Ans: a set which contains no elements = null set}estimating mean of the population {Ans: use sample statistics (x-bar, s, p-hat=sample proportion) to estimate the value of unknown population parameter (mu, small signma, p)}z-scores {Ans: are used to "standardize" all values of x so, it tells us the number of standard deviations original measurement is from the mean (mu)}class width {Ans: (max-min)/# of classes **Always round UP**}Quant or Qual? Nominal, Ordinal, interval or ratio? Salaries of college Profs {Ans: Quantitative, ratio}Multiplication Rule {Ans: Used to find the probability of two events in sequence P(A and B) = P(A) × P(B l A) If A and B are independent events, then = P(A) × P(B)}Sample {Ans: a subset of the population}systematic sampling {Ans: All elements of population arranged in some natural sequential order Then random starting point selected and every kth element selected for the sample}z-chart (Chart A2) {Ans: gives cumulative area to the LEFT}k {Ans: number of successes}complement of {Ans: what is NOT in the original}binominal setting {Ans: 1) there are a fixed number n of