OpenStax, Introductory Statistics 2e §8.3 A Population Proportion · Example 3 · Statistics · Confidence intervals
A Population Proportion · Example 3
A random sample of 25 statistics students was asked: “Have you smoked a cigarette in the past week?” Six students reported smoking within the past week. Use the “plus-four” method to find a 95% confidence interval for the true proportion of statistics students who smoke.
OpenStax, Introductory Statistics 2e · §8.3 A Population Proportion · Example 3
Stuck? A gentle nudge
No hints for this one.
Your working
Check your full solution
Attach photos of your pages (up to 3) or one PDF — or check what you typed above. Lemma reads the work and verifies the reasoning, not just the answer.
Your first check today doesn't need an account.
Your photos and PDFs are read once and not stored — only the transcription is kept.