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You read in a book about bridge that the probability that each of the four players is dealt exctly one ace is about 0.11. this means that
a. in every 100 bridge deals each player has one ace exactly 11 times.
b. in one million bridge deals the number of deals on which each player has one ace will scarely be within 100 of 110,000.
c. in a very large number of bridge deals the percent of deals on which a player has one ace will be very close to 11%.
d. in a very large number of deals the average number of aces in a hand will be very close to 0.11
The mean number of cargo ships that arrive at a port is 3 per day. The port has staff and facilities to handle up to 6 ships in a day. Using the Poisson distribution, find the probability that, on a given day,
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Lewis earned 85 on his biology midterm and 81 on his history midterm. In the biology class the mean score was 79 with standard deviation 5.
At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule.
At the .05 significance level, can we conclude that the guideline is still reasonable?
A consumer magazine randomly selected 100 new hybrid car dealers from across the country, and created a list of retail prices. They want to know if the price differs from $25,000.
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When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be
Sixteen juvenile rats were treated with the drug Naloxone (pairs 1,3,7,8) or, as a placebo control, Saline (pairs 2,4,5,6) and then observed for their play and non-play behavior in an open field for 1.5 minutes.
Normally distributed with mean equal to 15,000 and standard deviation equal to 1000. What is the lowest income among the richest 250 persons?
Construct a 95% confidence interval for the population mean.
Calculate (a) MAD, (b) MSE, and (c) MAPE for the following forecast versus actual sales figures.
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