Stat 101 Exam 2 with Questions and Answers

Stat 101 Exam 2 with Questions and Answers Normal distribution ANSWER symmetric, bell-shaped curve we have seen for almost all of our bootstrap and randomization distributions Central Limit Theorem ANSWER For a sufficiently large sample size, the distribution of sample statistics for a mean or a proportion is normal Quantitative variable: n ≥ 30 Categorical variable: counts of at least 10 within each category Accuracy ANSWER the distribution of the statistic is truly normal and you have generated many simulated randomizations, the p-values should be very close more simulations = more accurate intervals and p-values larger sample size = more accurate intervals and p-values Area Under the curve of a normal distribution ANSWER equal to the proportion of the distribution falling within that range; must know the mean and sd of a normal distribution Normal distribution vs. Bootstrap distribution vs. Randomized distribution ANSWER N (mean,standard deviation) N(statistic, se) N(null value, se)