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A self proclaimed psychic was tested with 100 cards face downand asked to determine what symbol, out of 5 possible symbols the card hado n it. How many would this person need to get right for us to be convinced at the 99% level tha t this person is a psychic?
As a condition of employment, Fashion Industries applicants must pass a drug test. Of the last 220 applicants 14 failed the test. Develop a 99 percent confidence interval for the proportion of applicants that fail the test.
Determine the mean number of times the machine was used per day.
Construct upper and lower control limits for the x chart, using the given product parameters. (b) Plot the data on the control chart. (c) Is this process in control? Explain your reasoning.
Acme Taxi has two taxi cabs. The manager tracks the daily revenue for each cab. Over the past 20 days, Cab A has averaged $76.00 per night with a standard deviation equal to $11.00.
Construct a grouped frequency distribution using six classes.
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
test the hypothesis that the mean μ = 100 against the alternative μ ≠ 100. Find the type II probability when the true mean heat evolved is 103.
How many months must be sampled for analysis to be 99% confidence that the error in estimating the average monthly price of gasoline is at most $0.03.
In a particular region of Cape Cod, it is known that lobstermen trap on average of 32 pounds of lobster per day with a standard deviation of four pounds.
How is the criminal justice system portrayed in the media and what impact does the media have on a viewer's perception as to the system's efficacy in dealing with crime?
510 people were asked which of four fast food restaurant were their favorite. Determine if there is a preference for any one place over any other.
If 3 adults are selected at random, what is the probability (correct to 3 decimal places) that at least one adult is overweight?
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