AP Statistics Final Ch. 8 Flashcards | Quizlet In checking conditions for constructing confidence intervals for a population mean, it's important to plot the distribution of sample data Below are dot plots describing samples from three different populations
ch 22 Flashcards | Quizlet To make this determination, he poses the following question to his listeners: "Do you think that the drinking age should be reduced to eighteen in light of the fact that eighteen-year-olds are eligible for military service?"
Margin of Error vs. Confidence Interval: Whats the Difference? We use the following formula to calculate a confidence interval for a population proportion: Confidence Interval = p + - z* (√p (1-p) n) where: Example: Suppose we want to estimate the proportion of residents in a county that are in favor of a certain law We select a random sample of 100 residents and ask them about their stance on the law