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Leakage from underground gasoline tanks at service stations can damage the environment. It is estimated that 25% of these tanks leak. You examine 15 tanks chosen at random, independently of each other.
(a). What is the mean number of leaking tanks in such samples of 15?
(b). What is the probability that 10 or more of the tanks leak?
(c). Now you do a larger study, examining a random sample of 1000 tanks nationally. What is the probability that at least 275 of these tanks are leaking?
What is the probability that he can open the lock at random if he knows that the numbers in the combination cannot be repeated?
Describe the unique fundamentals of a qualtitative research study, addressing the following:
a national survey of graduate students is conducted to assess thier consumption of coffee. the table below summarizes
Data on the number of occurrences per time period and observed frequencies follow. Use a=.05 and the goodness of fit test to see whether the data fit a Poisson distribution.
Utilize a test of the difference among proportions when answering these questions. Illustrate the research hypothesis.
The manager of a sport fishing products company wants to test the null hypothesis that a certain lead fishing weights have a mean weight of 4.0 ounces. Under what conditions would the manager commit a Type 1 error?
give the equation for the standard deviation of a sample drawn from a population with a known mean micro.give the
car size m3bodyyearyear9.941small cars2003less than 200510.251small cars1996less than 200510.699small cars2012greater
the waiting time for patients at local walk-in health clinic follows a normal distribution with a mean of 15 minutes
What is the maximum error of estimate for p ?
question consider two lotteriesl1 0.5 1000 0.2500 0.2300 0.1 200 l2 0.6 800 0.1600 0.3 100a using an exponential
Transportation problem using the stepping stone method
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