Ap Statistics Final Exam 2023|2024 Graded A+

What is a statistic? Give several examples. - ANSWER-A number computed from data. Ex. A related example of a sample would be a group of 7th graders in the United States What is a parameter? Give several examples. - ANSWER-A number that describes a population. Ex. An example of a population is all 7th graders in the United States. What alternate meaning does the word parameter have in other mathematical disciplines? - ANSWER-An "adjustable constant" that defines the nature of a mathematical model, much as a tuning knob or volume slider adjusts the output of a television or radio. What are the parameters of a uniform distribution? a normal distribution? a binomial distribution? a geometric distribution? a t distribution? a distribution? - ANSWER-Uniform: min and max [also need to know whether distrib. is discrete or continuous] Normal: and Binomial: n and p Geometric: p t: df : df Describe how to recognize uniform, normal, binomial, geometric, t, and distributions. - ANSWER-Uniform: flat line in relative frequency histogram Normal: classic continuous bell-shaped curve, satisfies 68-95-99.7 rule Binomial: discrete ("stairsteppy"); skew right if p .5, skew left if p .5, symmetric if p = q = .5 Geometric: discrete ("stairsteppy"), always skew right t: continuous, bell-shaped; virtually normal for large df, except with more "flab" in the tails : continuous, always skew right Define range and describe how to find it. - ANSWER-Range is a single number for the spread of values in a column of data: range = max - min. People who say things like "the range is from 28 to 75" are misusing the term in its statistical sense. Define IQR and describe how to find it. - ANSWER-IQR (interquartile range) = Q3 - Q1. Use STAT CALC 1 to get 5-number summary, then VARS 5 PTS 9 - VARS 5 PTS 7. Describe how to find outliers