Candidates Sample Test

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Math 140 SAMPLE Exam 1 Name___________________________________ Tuesday Class Time (circle one): 7:40 9:30 12:20 You are to mark your answers on the blue side of the scantron answer sheet. Be sure to put your name on the scantron. You should mark the answer sheet with a number 2 pencil (make dark marks), and completely erase changes. Choose the ONE answer that best completes the statement or answers the question. Make no stray marks. Provide an appropriate response. 1) The 1995 payroll amounts for all major-league baseball teams are shown below. What percentage of the payrolls were in the $20-$30 million range? 1) _______ A) 38% B) 11% C) 59% D) 10% 2) In a comprehensive road test on all new car models, one variable measured is the time it takes a car to accelerate from 0 to 60 miles per hour. To model acceleration time, a regression analysis is conducted on a random sample of 129 new cars. TIME60: y = Elapsed time (in seconds) from 0 mph to 60 mph MAX: = Maximum speed attained (miles per hour) Initially, the simple linear model E(y) = + was fit to the data. Computer printouts for the analysis are given below: UNWEIGHTED LEAST SQUARES LINEAR REGRESSION OF TIME60 CASES INCLUDED 129 MISSING CASES 0 Approximately what percentage of the sample variation in acceleration time can be explained by the simple linear model? 2) _______ A) 70% B) -17% C) 0% D) 8% 3) The variable measured in the experiment is called ____________ . 3) _______ A) the treatment B) a sampling unit C) the predictor variable D) the response variable 4) Use the spinner below to answer the question. Assume that it is equally probable that the pointer will land on any one of the five numbered spaces. If the pointer lands on a borderline, spin again. Find the

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