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For a particular instant lottery, the bettor can determine immediately whether a purchased ticket is a winning ticket. Suppose that the probability of a winning ticket is p=1/10.
a. What is the expected number of tickets that must be purchased in order to find a winning ticket?
Set up hypotheses and test to find out whether or not population variance is larger than $100.
Customers enter the waiting line at a cafeteria on a first-come, first-served basis. The arrival rate follows a Poisson distribution, while service times follow an exponential distribution.
public transportation and the automobile are two methods an employee can use to get towork each day. samples of times
A survey last week revealed that out of 400 viewers contacted, 94 watched the news on WBEN. Can we conclude that the percent of viewers has increased? Use the 0.05 significance level.
a large consumer goods company ran a television advertisement for one of its soap products. on the basis of a survey
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
The manufacturer wanted to determine if the tires were exceeding the guarantee. At the .05 significant level, it was concluded that the tires are exceeding the manufacturer's guarantee.
Calculate the mean and standard deviation of the following data sets, then produce a five number summary and box plot of data.
A 15-minute Oil and Lube service claims that their average service time is no more than 15 minutes. A random sample of 35 service times was collected, and the sample mean was found to be 16.2 minutes, with a sample standard deviation of 3.5 minute..
The normal distribution witha population standard deviation of 8 seconds. Suppose we select a sample of 16 cuts from various CD's sold by CRA CD's Inc.?
the number of traffic accidents occurring in bloomington in a single day is normally distributed with a mean and a
the mean score of a college entrance test is 500 the standard deviation is 75. the scores are normally distributed.
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