C207 WGU - Section 2 Statistics as a Managerial Tool Questions With Complete Solutions

Statistical analysis can be used to make __________ about entire populations using samples. correct answer: inferences What percent of the data of a normal distribution is within two standard deviations of the mean? correct answer: 95.4 Judy is a big supporter of her local police force. A surveyor from the city government calls to conduct a poll about her satisfaction with the police in her community. Judy gives overwhelmingly positive answers to the questions, even if she thinks there are some areas for improvement. What kind of bias is Judy introducing? correct answer: response bias What is the interquartile range of the following numbers? 5, 9, 14, 25, 32, 36, 37, 37, 43, 48, 51 correct answer: 29 What is the mean of the following data set? 9, 7, 23, 20, 4, 6, 26, 5, 21, 14 correct answer: 13.5 Which of the following numbers is closest to the 70th percentile? 3, 4, 5, 6, 7, 9, 10, 14, 20, 21, 23, 26, 65 correct answer: 20 If a man owns two sports cars, two luxury cars, and one SUV, what is the probability that he'll take a luxury car when he goes out tonight? correct answer: 2/5 If a man owns two sports cars, two luxury cars, and one SUV, what is the probability that the man will not take a luxury car out this evening? correct answer: 3/5