Central Limit Theorem: Review is part of the collection col10555 written by Barbara Illowsky and Susan Dean. The module consists of review exercises.
The next three questions refer to the following information: Richard’s Furniture Company delivers furniture from 10 A.M. to 2 P.M. continuously and uniformly. We are interested in how long (in hours) past the 10 A.M. start time that individuals wait for their delivery.
The length of time to brush one’s teeth is generally thought to be exponentially distributed with a mean of
minutes. Find the probability that a randomly selected person brushes his/her teeth less than
minutes.
Which distribution accurately describes the following situation?
A 2008 report on technology use states that approximately 20 percent of U.S. households have never sent an e-mail. (source: http://www.webguild.org/2008/05/20-percent-of-americans-have-never-used-email.php) Suppose that we select a random sample of fourteen U.S. households .
the number of households in a 2008 sample of 14 households that have never sent an email