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Study Resources (Statistics)

    11) Management at a home improvement store randomly selected 45 customers and observed their shopping habits. They recorded the number of items each of the customers purchased as well as the total time the customers spent in the store. Identify the types of variables recorded by the managers of the.
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  SHORT ANSWER.  Write the word or phrase that best completes each statement or answers the question.     181) The data below represent the numbers of absences and the final grades of 15 randomly selected students from a statistics class. Construct a scattergram for the data. Do you detect a trend?     181) ____________.
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    41) In a pizza takeout restaurant, the following probability distribution was obtained for the number of toppings ordered on a large pizza. Find the mean and standard deviation for the random variable.   41) ______ A) mean: 1.54; standard deviation: 1.30 B) mean: 1.14; standard deviation: 1.04 C) mean: 1.30; standard.
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MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. Solve the problem. 1) Classify the following random variable according to whether it is discrete or continuous. The number of cups of coffee sold in a cafeteria during lunch 1) _______ A) discrete B) continuous   2).
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    21) Consider the given discrete probability distribution. Construct a graph for p(x).   x 1 2 3 4 5 6 p(x) .30 .25 .20 .15 .05 .05   21)  _____________   MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question. 22) Consider the given discrete probability distribution. Find the probability that x equals 4.     22) ______ A) 2.12 B) 1.88 C).
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    51) The table shows the number of each car sold in the United States in June. Suppose the sales record for one of these cars is randomly selected and the type of car is identified.   Type of Car Number Sedan 7,204 Convertible 9,089 Wagon 20,418 SUV 13,691 Van 15,837 Hatchback 15,350 Total 81,589   a.List the sample points for this experiment. b.Find the probability of each sample point. c.What is.
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    131) At a small private college with 800 students, 240 students receive some form of government-sponsored financial aid. Find the probability that a randomly selected student does not receive some form of government-sponsored financial aid.  131)  ____________   132) The manager of a warehouse club estimates that 7 out of 10.
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    171) The overnight shipping business has skyrocketed in the last ten years. The single greatest predictor of a company's success is customer service. A study was conducted to determine the customer satisfaction levels for one overnight shipping business. In addition to the customer's satisfaction level, the customers were asked how.
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    161) Based on past experience, Josh believes that the probability of catching a red snapper is .21 and the probability of catching a grouper is .19. Is enough information available to find the probability of catching a red snapper or a grouper? Explain. If possible, find the probability of catching.
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