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Suppose that the four inspectors at a film factory are supposed to stamp the expiration date on each package of film at the end of the assembly line. John, who stamps 20% of the package, fails to stamp the expiration date once in every 200 package. Tom, who stamps 60% of the packages fails to stamp the expiration date once in every 100 packages; Jeff who stamps 15% of the packages, sails to stamps the expiration date once every 90 packages; and Paul, who stamps 5% of the packages, fails to stamp the expiration date once in every 200 packages. If a customer complains that her package of film does not show the expiration date, what is the probability that John inspected it?
Compare the mean of the sampling distribution of sample means with that of the population.
A sample of 25 concession stand purchases show a mean purchase of $5.29 with a standard deviation of $3.02. However, a later showing of the same movie, a sample of 25 purchases where the mean was $5.12 with a standard deviation of $2.14.
Any person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree.
The sameple you found that 114 of those adults sampled over the age of 24 smoke. Develop a 95% condience interval for the current porportion of adults over the age of 24 who smoke.
What is the stock's value at it's highest on 15 days of the year? (Assume that there are 240 trading days in a year).
College students are a major target for advertisements for credit cards. At a university, 65% of students surveyed said they had opened a new credit card account within the past year.
At a probability of type 1 error of 0.05, test the claim that the assistant professors earn more than $42000 per year. the standard deviation of the population is $5230.
Quality control studies for Leaky Jet Computer Printers show the lifetime of the printer follows a normal distribution with a mean of 4.5 years and a standard deviation of 0.85 years.
What is the hospital's cost of capital assuming that the hospital has the following capital structure on its Statement of Financial Position.
Determine the values of mean M and standard deviation s for original sample?
The mean return on investment is 25 percent and the standard deviation 5.2 percent. Compare the relative dispersion for the price-earnings ratios and return on investment.
As part of its testing program, LongLast tests a sample of 25 batteries. What is the standard error of the mean?
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