12/12/17, 12 : 08 AM Print Test Page 1 of 10 PRINTABLE VERSION Final You scored 43 out of 50 Question 1Your answer is CORRECT.Suppose that in a large metropolitan area, 82% of all households have cable tv. Suppose you areinterested in selecting a group of six households from this area. Let X be the number of households ina group of six households from this area that have cable tv. For what proportion of groups will at mostthree of the households have cable tv? a) 0.924b) 0.400c) 0.696d) 0.304e) 0.076 Question 2Your answer is CORRECT.A potato chip company calculated that there is a mean of 73.5 broken potato chips in each productionrun with a standard deviation of 5.2. If the distribution is approximately normal, find the probabilitythat there will be fewer than 69 broken chips in a run. Question 3 Your answer is CORRECT.
12/12/17, 12 : 08 AM Print Test Page 2 of 10 A distribution of grades in an introductory statistics class (where A = 4, B = 3, etc) is:012340.1 0.19 0.2 0.31 Find the mean and variance for the grades in this class. 0.2 Question 4Your answer is INCORRECT.The weights of male and female students in a class are summarized in the following boxplots:Which of the following is NOT correct? Question 5Your answer is CORRECT.Given that , find . xp(x) P(A) = 0.33,P(B) = 0.44, and P(A∩B) = 0.18P(A|B )
12/12/17, 12 : 08 AM Print Test Page 3 of 10 a) 0.545b) 0.409c) 0.145d) 0.855e) 0.591
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