Average number of logins to a statistics department
Assume that the average number of logins to a Statistics department server is 6 per minute. What is the probability that
a) no log-ins in a 1-minute period?
b) one or two log-ins in a 1-minute period?
c) more than 25 log-ins in a 5-minute period?
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Assume the z-scores of the bone mineral density test values are normally distributed with a mean of 0 and a standard deviation of 1.
A real emergency condition is a rare event, with probability 0.004. Given that the alarm has just sounded, determine the probability that a real emergency situation exists?
The defense psychiatric reports found him to be insane while prosecution reports declared him legally sane. In specific, the defense sought to establish that brain scan results like John Hinckley's appeared in the higher percentage of schizophreni
The test had seemingly amazing characteristics. Assume that the sensitivity of the test is 1.00, and specificity of the test is 0.9998. We assume that the prevalence of muscular distrophy among infants is 0.0002 (1 in 5000). Please give all answer
A Fibonacci die employed in some games has sides with numbers 1, 1, 2, 3, 5, and 8. Determine the probability that two Fibonacci dice are tossed and result is an odd number?
A company issues 7-digit ID numbers to each of its employees. How many ID numbers can be made if the following criteria should all be met:
A county welfare agency employs 24 welfare workers who interview prospective food stamp recipients. Periodically, supervisor chooses, at random, the forms completed by two workers to audit for illegal deductions. Unknown to supervisor, nine of the
A severe drought affected several western describes for 3 years. A Christmas tree farmer is worried about the drought's effect upon the size of his trees. To decide whether the growth of trees has been retarded, the farmer decides to take sample o
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