Question

Question 5 An urban planner is researching commute times in the San Francisco Bay Area Select all that apply. to find out if commute times have increased. In which of the following 10 points situations could the urban planner use a hypothesis test for a population mean? Check all that apply. A. The urban planner asks a simple random sample of 110 commuters in the San Francisco Bay Area if they believe their commute time has increased in the past year. The urban planner will compute the proportion of commuters who believe their commute time has increased in the past year. B. The urban planner collects travel times from a random sample of 125 commuters in the San Francisco Bay Area. A traffic study from last year claimed that the average commute time in the San Francisco Bay Area is 45 minutes. The urban planner will see if there is evidence the average commute time is greater than 45 minutes. C. The urban planner asks a random sample of 100 commuters in the San Francisco Bay Area to record travel times on a Tuesday morning. One year later, the urban planner asks the same 100 commuters to record travel times on a Tuesday morning. The urban planner will see if the difference in commute times shows an increase.

Answer 1

ANI ② and 2 In case of B, he taken sample size =125. and according to trafic & study they claimed Comunte average comate time is usmi so we can test her the average commut time is incresel or not by tising t-test we Hoi ela us Vis Hilreys Hoi Average H: Average commuk is commute is us min. greter than 25. In case of can itu He recorled na100 sumples trone time of people in tuesday moming and after one yeur he collented some information form na 100 2 sumples to so we can test diffrince commute time is incresed or not by using paired-t-tesz L Ho! l-elo Ho: Mdzo vis Hiiele? el Hii eldro. wis elaa average of commute time of curent yeu las average commuk time after I yeur, alldal all