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a.) find the expected values of X and Y

b.) based on the resukts in (a), which bond should tony and yvette invest in?

with a standard deviation of 3 minutes. Assume that the data is normally distributed. What is the

probability that the trip will take more than half an hour?

what is the probability that the hospital will not have enough beds to accommodate its newly admitted patients?

In an experiment with a new tranquilizer, the pulse rates (per

minute) of 12 patients were determined before they were given

the tranquilizer and again 5 minutes later, and their pulse rates

were found to be reduced on the average by 7.2 beats with a

standard deviation of 1.8. At the level of significance 0.05,

do we have significant evidence that the mean pulse reduction

with this tranquilizer is less than 9.0 beats?