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A drama fan has taped 9 episodes (on nine different videotapes)of a drama. however, he only has time to watch four episodes. suppose he selects four tapes at random.
1. how many different ordered arrangements of episodes are possible?2. if the finale is on tape, what is the probability he will select and watch this episode last.
A food snack manufacturer samples 13 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 14.7 oz. and the sample standard deviation is 0.50 oz., find the 95% confidence interval of the true mean.
Superior Medical System's 2005 balance sheet showed total common equity of $2,050,000. The company had 100,000 shares of stock outstanding which sold at a price of $57.25 per share.
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
To test the hypothesis that 48% of PC users have never used a Mac, the analyst took a sample of 50 PC customers drawn at random and found that 22 of them had never used a Mac.
Find would be answer to part(a) if there were only single server which can serve customers twice as fast (i.e, with service rate four customers per hour)?
The superintendent of a unified school district of a small town wants to make sure that no more than 5% of the students skip more than 10 days of school in a year.
Compare the mean and standard deviation of the actual distribution of your 50 sample proportions for 20 tosses to what the theoretical sampling distribution model says the mean and standard deviation should be.
Use a 0.01 significance level to test the claim that most people believe that the Loch Ness monster exists. How is the conclusion affected by the fact that Internet users who saw the question could decide whether to respond.
It is estimated that .44 percent of the callers to the customer service department of Dell Inc. Will receive a busy signal. What is the probability that of today's 1200 callers at least 5 will receive a busy signal? Use the poisson approximation t..
What is the minimum sample size needed in order for you to be confident that your estimate is within 5 of ? Use the value for the population standard deviation of scores on this subsection.
What is the current breakeven cost? What would happen to the breakeven point if we lower our fixed costs by $100,000 but increased our variable cost by $5 per unit?
The rest have no opinion. " Suppose that a a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
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