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33 a 78 b 75 c 72 d 68 34 a 408 b 415 c 433 d 450 35

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You see a TV commercial that states that “seven out of ten physicians surveyed prefer theingredients in pain reliever X to plain aspirin.”You write the company because you arecurious about the survey, and to your amazement, you find that the survey was of exactlyten physicians.Suppose the population of physicians was indifferent as to the advertisedproduct and plain aspirin, that is, 50% preferred aspirin and 50% preferred the advertisedproduct.What is the probability that a survey of ten randomly selected physicians wouldfind seven or more who preferred the advertised product?P(70 ≤ x ≤ 80) = ________
34aIn the previous question, what is the standard deviation of the number of vehicles violatingthe speed limit?
35If the state police issued $180 speeding ticket to each speedster, what is the expected valueof the amount collected from speeding tickets?a$13,500b$12,750c$12,250d$11,200
33In repeated experiment of clocking 100 vehicles what is the expected value of the number ofvehicles which violate the speed limit?a78b75c72d68
x*f(x)x2x2*f(x)x*4x*f(x)x2x2*f(x)
1250050-400-81600003200510000500-200-1040000200015225002250000087.51225003062580020064000016000020016000080000100050010000005000002720250012150120072144000086400113025006050160032256000051200346.5822500131625786802800
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Term
Spring
Professor
NoProfessor
Tags
Variance, Probability theory, Tom

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