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Millions of Americans are subjected to drug testing in the workplace. The tests are not always reliable. A false positive rate of 5% is considered to be a conservative estimate. Suppose that there are 40 employees in your company, which test its workers monthly.
a.) What is the probability of no false-positives for this month's test?
b.) What is the probability of at least one false-positive for this month's test?
c.) What is the likelihood that the test will give 5 to 10 false-positives?
d.) What is the chance of at most 3 false-positive?
e.) How many false-positives should the company expect with what standard deviation?
A large industrial firm uses 3 local motels to provide overnight accommodations for its clients. From past experience it is known that 20% of the clients are assigned rooms at the Ramada Inn, 50% at the Sheraton, and 30% at the Holiday Inn.
a sample of 500 drivers was asked whether or not they speed while driving. the following tabel gives a two-way
A new shopping mall is considering setting up an information desk manned by one employee. Based upon information obtained from similar information desks, it is believed that people will arrive at the desk at the rate of 15 per hour.
a brewerys filling machine is adjusted to fill bottles with a mean of 31.2 oz. of ale and a variance of 0.003.
a days sales in 1000 units at a gas station have a gamma distribution with parameters k 2 and 09.a what are the
you conducted a t-test in your research. you did not find a statistically significant difference between your groups
Support your contention with three examples from your experience at other organizations or departments. Where applicable, for each example, indicate what are the treatments and blocking variables.
I scheduled three calls for a particular day, and each call has a probability of 0.5 of making a sale. What are his probabilities of making (a) three sales, (b) two or more sales, (c) no sales?
Find the P value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H0 for the given level of significance deviation. Two-tailed test with test statistic z= -2.43 and standard deviation = 0.04..
explain the parts of a decision tree.what are some benefits of using decision trees?in what ways can decision trees be
A random sample of 200 students at UCLA shows that 120 of them have internet access. Test the claim that the true population proportion of students at UCLA who have internet access
Assume that customers arrive completely randomly, one at a time, at the rate of 15 per hour. Calculate the operating characteristics of interest to the manager.
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