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A diagnostic test has been developed for a rare disease that afflicts 1 out of 1000 adults. It has a sensitivity (true positive rate) of 99% and a specificity (true negative rate) of 98%.
(a) If a randomly selected adult is is positive based on the test, what is the probability that the person has the disease?
(b) Is this a good diagnostic test?
Find the mean and standard deviation for the numbers of boys in groups of 51. b) Is the result of 39 boys unusual? Does it suggest that the gender-selection method appears to be effective?
an interactive system consists of ten terminals that are connected to the central com- puter. at any time each terminal
if Susan constructs a small station and the market is good, she will realize a profit of $50,000.What is the maximax decision? What is the Hurwicz (criterion of realism) decision with α = 0.8?
Pierre operates a currency exchange office at Orly Airport in Paris. His office is open at night when the airport bank is closed.
Entities arrive at single-server queuing system at average of 4 per hour and server can service average of 5 per hour. Mean in the queue is?
Which is the probability of that the median of the sample or average medians be between 320 and 350 minutes?
A Vermont company is monitoring a process that fills maple syrup bottles. When the process is filling correctly, the median average fill in an 8-ounce bottle.
What is the probability that no customers arrive between 8:30 A.M. and 9:30 A.M. on Monday morning? What is the expected number of arrivals in this period?
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
A private equity firm is evaluating two alternative investments. Although the returns are random, each investment's return can be described using a normal distribution.
Calculate the mean, median, and standard deviation for ounces in the bottles and construct a 95% Confidence Interval for the ounces in the bottles.
A newspaper concluded that 92.5% of homes had either a computer or access to the Internet. Do you agree? Explain.
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