2. Over at NAIA, you are observing the average length of flight delays (excluding flights that leave on time). Your notes for ten randomly chosen days are here: Ave. delay (hrs:min) 0:43 Ave. delay...

Extracted text: 2. Over at NAIA, you are observing the average length of flight delays (excluding flights that leave on time). Your notes for ten randomly chosen days are here: Ave. delay (hrs:min) 0:43 Ave. delay (hrs:min) 2:00 Day Day 1:48 7 0:13 0:19 8. 0:17 0:25 2:18 9. 10 0:34 3:12 If the airport claims that the delays will be no more than a minute on average, check his claim by doing the following: (a) Write the null hypothesis. (b) Write the alternative hypothesis. (c) Formulate and calculate the test-statistic. Is it a one-tail or two-tailed test? Did the airport told you the truth at 95% confidence level? (d) Determine the confidence interval. 3. Repeat (2) if it is normally distributed.