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A publisher reports that 74% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 300 found that 70% of the readers owned a laptop. Determine the P-value of the test statistic. Round your answer to four decimal places.
Construct a 95% confidence interval for the true average amount of time customers spent in the restaurant. With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 2.5 minutes or less?
Costs of Televisions Listed below are prices (in dollars) and quality rating scores of rare-projection televisions (based on data from Consumer Reports). All of the televisions have screen sizes of 55 in or 56 in.
If you record data for a year, and find that the mean number of women in shelters is 250, with a standard deviation of 75, and the distribution is normal, answer this. If the city's shelters have a capacity of 350, will that be enough places for the ..
A contract was given for the cost of making a new aircraft component. The actual cost, X, in $50,000, is predicted by the probability density function
Assume that you have selected 10 students enrolled at your college and have collected data for these three variables:
Past studies have shown that only 95% of booked passengers actually show up for the flight. What is the probability that exactly 99 booked passengers actually show up for the flight?
The 2009 National Assessment of Educational Progress (NAEP) gave a mathematics test to a random sample of eighth-graders in Texas. The mean score was 287 out of 500. To give a confidence interval for the mean score of all Texas eighth-graders, you..
the staff of porter manufacturing has estimated the following net after-tax cash flows and probabilities for a new
How many integers are there between 5 and 14? How Many rational numbers are there between 5 and 14?
What type of test is described below and can you provide the null and alternate hypothesis? Using an old manufacturing process.
suppose that air pollution in a city is caused by the following four sources automobile exhaust a industrial exhaust i
Determine the degree of freedom, find the critical value, and identify the rejection region. Calculate the test statistic. If convenient, use the technology.
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