AP Statistics Final Review (S1) Questions With Complete Solutions

Is mean resistant to outliers? correct answer: No, non-resistant Is median resistant to outliers? correct answer: Yes, resistant Is standard deviation resistant to outliers? correct answer: No, non-resistant What is included in the 5-number summary? correct answer: min, Q1, med, Q3, max IQR equation correct answer: IQR = Q3 - Q1 Which point divides the area under the density curve in half? correct answer: median Which point is the balance point of the density curve? correct answer: mean What is the difference between x-bar and μ? correct answer: x-bar is sample mean, μ is population mean What is the difference between s and σ? correct answer: s is stdv of sample, σ is stdv of population Inflection points formula correct answer: μ ± 1σ What is the 68-95-99.7 rule? correct answer: 68% of observations fall in 1σ 95% of observations fall in 2σ 99.7% of observations fall in 3σ What command do you use to find z-score on the calculator? correct answer: invnorm (percentage, μ, σ) What is the formula for z-score? correct answer: (x - μ) / σ Continuous variable correct answer: can take any value between two values (decimals) Discrete variable correct answer: full countable values (whole numbers) 1.5 IQR rule for outliers correct answer: calculate IQR calculate Q1 - 1.5 (IQR) calculate Q3 - 1.5 (IQR) anything outside of those values is an outlier How do you determine if an outlier is influential using the calculator? correct answer: calculate LRSL with the point and without it How do you find LRSL, r², and r on the calculator? correct answer: stat calc LinReg( a + bx )