FALL 2021 - Final Exam ONLY q ersity/introduction-to-statistical-modeling-i/fall-2021-final-exam-only-questions/20671578 nts Q Ask an Expert Sign in & Down Note: I. There are eight (8) questions. The grading scheme for each question is approximate and tentative may therefore be subject to change. II. Define variables, state assumptions, and justify distributions where appropriate. 1. [7 marks] An airline claims that at least 90% of their lost luggage is recovered and delivered to its owner. A consumer group surveyed a random sample of 200 passengers who lost their luggage with this airline and found that 168 got their luggage back. At a =0.10, is there enough evidence to conclud that the airline's claim is incorrect? Use the rejection point method. 2. [5 marks] Of every 10 car accidents that happen in the Winter, 8 happen on snowy days and 2 happen on non-snowy days. Last Winter 40% of the days were snowy. If a car had an accident last Winter, what is the probability that the accident happened on a non-snowy day? 3. [18 marks] A study was conducted to investigate where people get their news. The study included people in the age group 18-29 and 1500 people in the age group 30-55. The sample proportions of peo whose main source of news is newspapers is 0.18 and 0.25 for the age groups 18-29 and 30-55, respect A. [8marks] Find the 95% confidence interval for the difference in the proportion of people whose ma ENG O UK PPI bit sc delete 9 O P