'Level confidence interval' presentation slideshows

Review: Large Sample Confidence Intervals

n >30 or so for means, np and n(1-p) both > 5 for proportions. Review: Large Sample Confidence Intervals. 1- a confidence interval for a mean: x +/- z a /2 s/sqrt(n) 1- a confidence interval for a proportion: p +/- z a /2 p(1-p)/sqrt(n)

432 views • 24 slides

Review: Large Sample Confidence Intervals

n >30 or so for means, np and n(1-p) both > 5 for proportions. Review: Large Sample Confidence Intervals. 1- a confidence interval for a mean: x +/- z a /2 s/sqrt(n) 1- a confidence interval for a proportion: p +/- z a /2 p(1-p)/sqrt(n)

253 views • 24 slides

Chapter 21

Chapter 21. What Is a Confidence Interval?. Recall from previous chapters:. Parameter fixed, unknown number that describes the population Statistic known value calculated from a sample a statistic is used to estimate a parameter Sampling Variability

154 views • 15 slides

Welcome Back

199 views • 12 slides