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Recent statistics suggest that 15 percent of those who visit a retail site on the World Wide Web make a purchase. A retailer wished to verify this claim. To do so, she selected a sample of 16 "hits" to her site and found that 4 had actually made a purchase.
a. What is the likelihood of exactly four purchases?
b. How many purchases should she expect?
c. What is the likelihood that four or more "hits" result in a purchase?
An airline has surveyed a simple random sample of air travelers to find out whether they would be interested in paying a higher fare in order to have access to e-mail during their flight.
an experiment on rocket shooting distance is conducted to test the effects of using different fuels and propellers.
Subscribe to Cool Teen and 35% subscribe to neither magazine, what is the probability that a randomly selected teenager subscribes to both magazines?
in a left-ailed test comparing two means with variances unknown but assumed to be equal the sample sizes were n1 8 and
There are 400 employes and 100 of them smoke. There are 250 males working for the company and 75 of them smoke. What is probability of an emloye selected random?
An investigation of past consumer surveys done by a company reveals that 2/3 of customers contacted respond to the survey. The marketing manager wants to do a new survey and plans to contact 198 customers
Arthur Schopenhauer, which view of experience seems closest to how you view the world? Briefly explain this philosopher's view as it compares to your view.
hurricane katrina forced insurance companies to examine policy rates and originally determined that the average claim
The mean number of books each professor has. How many professors must the anthropologist sample to obtain an average accurate to within 14 books per professor?
automobiles arrive at a vehicle equipment inspection station according to a poisson process with rate ? 10 per hour.
this exercise ilustrate that poor quality can affect schedule and cost. a manufacturing process has 100 customer order
SmartMinds University is running a promotional raffle that offers a chance to win either a 1-year discount on tuition cost (which results in a $500 savings) or a 2-year discount on bookstore purchases. Is this promotion worth it if the tickets cost..
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