Quiz: E Final Exam - Friday X m/courses/3469446/quizzes/secured#lockdown Question 38 1 pts What are the factor levels? Old and new website designs Time spent on old website and time spent on the new website The following 2 questions are related. A bank is studying the average time that it takes 6 of its tellers to serve a customer. Customers line up in the queue and are served by the next available teller. Based on service time for the last 140 customers, the following ANOVA result is obtained. Source DF SS MS F P-value Teller 5 3315.32 663.064 1.508 0.1914 Error 134 58919.1 439.695 Total 139 62234.4 A bank branch manager wondered if the average service times among the tellers are different. Secure Exam Proctor is sharing your screen. Stop sharing Hide Q Search L21472 x Quiz Final Exam - Friday X + structure.com/courses/3469446/quizzes/secured#lockdown D Question 39 What is the null hypothesis? O H 1=H2 =...=H6 O At least two of the means are different D Question 40 At the 10% significance level, O We reject the null hypothesis O We cannot reject the null hypothesis D Question 41 Secure Exam Proctor is sharing your screen Stop sharing Using descriptive statistics, you have found out that it takes an average of 55Quiz: Final Exam - Friday X + .com/courses/3469446/quizzes/secured#lockdown We cannot reject the null hypothesis Question 41 1 pts Using descriptive statistics, you have found out that it takes an average of 55 minutes to complete a mid- term exam in ISDS 361 A. However, you were surprised to see that the median completion time is 40 minutes. This observation means that O exam completion time is positively skewed O exam completion time is negatively skewed O exam completion time resembles the normal distribution O exam completion time is probably tri-modal Question 42 1 pts One of the requirements of admission to most colleges is applicant's SAT score. Suppose that Mike's SAT score is more than 2 standard deviations above the average SAT score of those admitted to college X. Close inspection of the Secure Exam Proctor is sharing your screen. Hide mal distribution. Stop sharing Then, Q Search472 x Quiz: M Final Exam - Friday X + cture.com/courses/3469446/quizzes/secured#lockdown Mike's 2-score is -3 Question 43 1 pts For a normally distributed random variable X with mean = 50 and variance = 25, what is P(X > 55)? Round your answer to 4 decimal places. 0.1587 0.8413 0.4207 0.5793 Question 44 A professor does not believe that his students spend 2 hours on average studying for the final exam. He thinks they spend more time than that. What are the null and alternative hypotheses, respectively? O H 2 us 2 and H