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Although cities encourage carpooling to reduce traffic congestion, most vehicles carry only one person. For example, 70% of vehicles on the roads in Winnipeg during rush hour are occupied by just the driver. If you choose 12 vehicles at random, what is the probability that 7 or more carry just the driver?
Let Z be a standard normal random variable. Calculate the following probabilities using the calculator provided. Round your responses to at least three decimal places.
Which of the following would be most helpful in assessing the practical significance of a test of hypotheses about a proportion?
Utilizing a binominal experiment, that is each trail can be reduced to two outcomes, construct a binomial distribution.
Rank the funds by using this alternative measure of risk. Which, if any outperformed the market on the risk-adjusted basis.
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
The standard deviation is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be more than 13 pounds.
Conduct the appropriate analysis to determine if there was an effect of the music on completing problems. Construct the appropriate graph to show the differences in the scores of the two groups.
A coin tossed 100 times and 530 heads appear. At a=0.05, test the claim that this is a non biased coin. Use a P-Value. does this suggest the coin is fair?
Find the range and the standard deviation of the times.
Draw a transition diagram. Write the Transition Matrix. If it rains on Thursday, what is the probability that the restaurant will be closed on Saturday? And on Sunday?
Test, at the 5% level of significance, whether the population standard deviation of hours spent studying is less than 10. Use the Critical value approach.
What proportion of 1040R tax forms will be completed in more than 114 minutes? Round your answer to at least four decimal places.
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