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Based on a survey of 1,000 adults by Greenfield Online and reported in a May 2009 USA Today Snapshot, adults 24 years of age and under spend a weekly average of $35 on fast food. If 200 of the adults surveyed were in the age category of 24 and under and they provided a standard deviation of $14.50, construct a 95% confidence interval for the weekly average expenditure on fast food for adults 24 years of age and under. Assume fast food weekly expenditures are normally distributed.
Using the full 5-step process test to see if a population mean is not 25. Sample data is: Mean 24, standard deviation 10 and a sample of 400 was taken.
A total of 61,647 people responded to an Elle/ MSNBC.com survey. It was reported that 50% of the respondents were women and 50% men.
There are four conditions/requirements that must be met in order to perform simple linear regression. For each of the conditions below, choose the technique that should be used to determine whether or not that the condition is met.(Each answer ma..
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles. The standard deviation of the mileage is 5,000 miles.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
If the ball is red put it back into the urn. If the ball is black, replace it with a red ball. Let X be the number of picks needed to get the fourth black ball. Find E[X].
a shipment of 7 television sets contains 2 defective sets. a hotel makes a random purchase of 3 of the sets. if x is
statistics released by the national highway traffic safety administration and the national safety council show that on
Find the probability that the mean weight of those loads is less than 42.00 tons. Assume that the variable is normally distributed.
In recent years, 3.4 children per year get sick with measles in Minnesota. If a recent year is taken at random, what is the probability that:
What is the probability that the poll gets a sample in which fewer than 45% say they do not get enough time for themselves. Show your method.
A research company has designed three different systems to clean up oil spills. The following table contains the results, measured by how much surface area (in square meters) is cleared in 1 hour. The data were found by testing each method in seve..
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