STAT 4201 Midterm: Statistics 421 PastExam2_WithSolutions-3
31 Jan 2019
School
Department
Course
Professor
Document Summary
Show all of your work for partial credit. This is a closed book, closed notes, closed neighbor exam. You may use a calculator and two pages of notes. There is a page of scrap paper at the back of the exam that you may tear o and use. All necessary statistical tables are provided: (6 pts) suppose that a random samples of voters in ohio is taken5 to determine the percentage of voters who favor a particular candidate. Suppose that 84 of 250 vot- ers sampled planned to vote for the candidate in the upcoming election. Find a 98% con dence interval for the proportion of ohio voters who plan to vote for the candidate. 250 = 0. 336 and the 98% con dence interval is 0. 336 2. 33q 0. 336(1 0. 336) 250 = 0. 328 and the 98% con dence interval is 0. 328 2. 33q 0. 328(1 0. 328) 250: let x1 and x2 constitute a random sample from a normal population with 2 = 1.
