Question: A credit card company has a fraud detection service that determines
A credit card company has a fraud-detection service that determines if a card has any unusual activity. The company maintains a database of daily charges on a customer's credit card. Days when the card was inactive are excluded from the database. If a day's worth of charges appears unusual, the customer is contacted to make sure that the credit card has not been compromised. Use the following daily charges (rounded to the nearest dollar) to determine the amount the daily charges must exceed before the customer is contacted.
Answer to relevant QuestionsA survey of 50 randomly selected full-time Joliet Junior College students was conducted during the Fall 2010 semester. In the survey, the students were asked to disclose their weekly income from employment. If the student ...(a) Identify the shape of the distribution and (b) Determine the ﬁve-number summary. Assume that each number in the ﬁve-number summary is an integer. The following data represent the percentage of workers who carpool to work for the 50 states plus Washington, D.C. (a) Find the five-number summary. (b) Construct a boxplot. (c) Comment on the shape of the distribution. Explain how to determine the shape of a distribution using the boxplot and quartiles. On October 6, 2010, Roy Halladay of the Philadelphia Phillies threw the second post-season no-hitter in major league history. The side-by-side boxplot on the next page shows the pitch speed (in miles per hour) for all of ...
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