Test of a Single Variance · Exercise 19
Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes. It claims that the average delay is so consistent that the variance is no more than 150 minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25 flights. The average delay for those 25 flights is 22 minutes with a standard deviation of 15 minutes.
Let α = 0.05
Decision: ________
Conclusion (write out in a complete sentence.): ________
This exercise has fill-in blanks from its source book and no answer key.
OpenStax, Introductory Statistics 2e · §11.6 Test of a Single Variance · Exercise 19
No hints for this one.
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.