1) What is a point estimator? a) Single value estimate b) Multiple estimates c) Sample mean d) Population median 2) What does a confidence interval estimate? a) Population proportion b) Sample size c) Population mean d) Sample variance 3) What is simple probability? a) Likelihood of an event b) Complex calculation c) Event certainty d) Random chance 4) What is a point estimator? a) Sample statistic b) Population parameter c) Sample size d) Confidence level 5) What does a confidence interval estimate provide? a) Range of values b) Exact value c) Sample mean d) Population median 6) What is the typical confidence level? a) 90% b) 95% c) 99% d) 80% 7) What is the probability of a Type I error? a) Alpha level b) Beta level c) Power d) P-value 8) What does a high confidence level mean? a) More certainty b) Less certainty c) Smaller interval d) Lower probability 9) What is the population proportion symbol? a) p b) μ c) σ d) n 10) Which factor affects the width of a confidence interval? a) Sample size b) Sample mean c) Population median d) Confidence level 11) What is simple probability? a) Event over total b) Event times total c) Event plus total d) Event minus total 12) What is the complement of an event? a) Not happening b) Happening c) Certain event d) Impossible event 13) What does a point estimator estimate? a) Population parameter b) Sample size c) Population mean d) Sample median 14) Which is a common point estimator for proportion? a) Sample proportion b) Sample mean c) Sample median d) Sample variance 15) What is the main purpose of a confidence interval? a) Estimate parameter b) Test hypothesis c) Calculate mean d) Determine median 16) What does a wider confidence interval indicate? a) Less precision b) More precision c) Smaller sample d) Lower confidence 17) Which of these affects the confidence level? a) Chosen by researcher b) Sample size c) Population size d) Data variability 18) What is the probability of an event? a) Between 0 and 1 b) Exactly 1 c) Always 0.5 d) Always 1 19) What is the main goal of statistical inference? a) Make conclusions b) Collect data c) Describe data d) Organize data 20) What does the symbol 'n' represent? a) Sample size b) Population size c) Number of choices d) Number of questions 21) What is the main use of probability? a) Predict outcomes b) Calculate averages c) Measure variability d) Describe data

Population Proportion Quiz

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