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AC Nielson Company provides information to organizations advertising on television. Prior research indicates that adult Americans watch an average of 6.0 hours of television per day with a standard deviation of 1.5 hours.
a. What is the probability that a randomly selected adult American watches 5 or more hours of television per day?
b. What is the probability that a randomly selected adult American watches between 7 and 8 hours (inclusive) of television per day?
c. For how many hours per day mist an adult American watch television in order to be in the top 5% of all the Adult American television watchers?
d. In a sample of 25 randomly selected adult Americans what is the probability that the average time for watching television per day will be equal to or exceeds 6.5 hours?
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Vanna White is the hostess of Wheel of Fortune, one of the most popular game shows in television history. Capitalizing on the fame that her participation in the show has bestowed on her, Ms. White markets her identity to various advertisers.
You had calculated the following measures of central tendency: the mean, the median, and the mean trimmed 25%. Which of these measures of central tendency will change when you correct the recording error?
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Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Make a plot of the total number of tornadoes by year. Does a linear trend over years appear reasonable? Are there any outliers or unusual patterns? Explain your answer.
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