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Arrivals during the evening at a hospital emergency room are assumed to follow a Poisson distribution. The rate on Saturday evening is 2.5 per hour and on Sunday evening is 0.5 per hour.
(a) Find the probability of 6 or more arrivals on Saturday during the period 8pm to midnight.
(b) Find the probability of 2 or fewer arrivals on Sunday during the period 9pm to midnight, given that there is at least 1 arrival.
A poll of U.S. health professionals revealed 82% would choose the same career. In a hypothesis test conducted at a level of significance of 5%, a P-value of 0.023 was obtained.
customers arrive at a local atm at an average rate of 20 perhours. assume the time arrivals follow the exponential
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
yashchin 1995 discusses a process for the chemical etching of silicon wafers used in integrated circuits. this process
the weights of ripe watermelons grown at mr. smiths farm are normally distributed with a standard deviation of 2.7 lb.
determine the t critical value for a two-sided confidence interval in each of the following situations. round your
The purchase price is $25 per tire if fewer than 200 tires are ordered, $16 per tire if 200 or more, but fewer than 8,000, tires are ordered, and $25 per tire if 8,000 or more tires are ordered.
The means appear to be very close, but not the variances. At α = .05, is there a difference in variances? Show all steps clearly, including an illustration of the decision rule.
Assuming that these results are sample data randomly selected from the population of all past and future Olympic games
a market research survey is available for 10000. using a decision tree analysis it is found that the expected monetary
due to limited capacity only 200 of these can be made each month on regular time and the cost is 300 each. however an
Solve the equations using linear algebra
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