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Crash Data The Insurance Institute for Highway Safety conducts experiments in which cars are crashed into a fixed barrier at 40 mph. In a 40-mph offset test, 40%% of the total width of each vehicle strikes a barrier on the driver side. The barrier's deformable face is made of aluminum honeycomb, which makes the forces in the test similar to those involved in a frontal offset crash between two vehicles of the same weight, each going just less than 40 mph. You are in the market to buy a new family car, and you want to know whether the distribution of head injury resulting from this offset crash is the same for large family cars, passenger vans, and midsize utility vehicles at the a = 0.01 level of significance. The following data were collected from the study. Source: Insurance Institute for Highway Safety Large Family Head Injury Passenger Head Injury Midsize Utility Head Injury Cars [hic)) Vans (hic) Vehicles (hic) Hyundai Toyota 284 148 Honda Pilot 225 XG300 Sienna Honda Ford Taurus 134 238 Toyota 4Runner 216 Odyssey Buick Mitsubishi 409 Ford Freestar 340 186 LeSabre Endeavor Chevrolet 530 Mazda MPV 803 Nissan Murano 307 Impala Chevrolet Chrysler 300 149 550 Ford Explorer 353 Uplander Pontiac 627 Nissan Quest 470 Kia Sorento 411 Grand Prix Toyota Avalon 186 Kia Sedona 322 Chevy Trailblazer 397Describe the difference between parametric statistical procedures and nonparametric statistical procedures.\fRandom-Number GeneratorsUsing statistical software or a graphing calculator with advanced statistics features, randomly generate a sequence of 20 integer values, each either 0 or 1. Conduct a runs test at the o= 0.05 level of significance to verify that the sequence of integers is random.Compare and contrast observational studies and designed experiments. Which study allows a researcher to claim causality?In Problems Determine whether the underlined value is a parameter or a statistic. In a survey of 1011 people age 50 or older, 73%% agreed with the statement "I believe in life after death." Source: Bill Newcott. "Life after Death," AARP Magazine, Sept /Oct. 2007Math Scores Researchers wanted to compare math test scores of students at the end of secondary school from various countries. Eight randomly selected students from Canada, Denmark, and the United States each were administered the same exam; Source: Based on data obtained from the International Association for the Evaluation of Educational Achievement Canada Denmark United States 578 548 568 563 506 458 548 530 530 535 518 456 521 502 571 581 485 513 555 492 589 513 480 491 Can the researchers conclude that the distribution of exam scores is the same for each country at the a = 0.01 level of significance
