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Heights of men on a baseball team have a bell-shaped distribution with a mean of 169 cm and a standard deviation of 5 cm. using the emperical rule, what is the approximate percentage of the men between the following values. A: 159 cm and 179 cm. B: 164 cm and 174 cm
A financial adviser is interested in predicting bond yield based on bond terms, i.e., one year, two years, etc. What is the dependent variable?
Assume that the mean useful life of a particular lightbulb is 2,000 hours and is normally distributed with a standard deviation of 300 hours. Determine the percentage of lightbulbs that will last 2,300 hours or longer.
A recent study at a local college claimed that the proportion of students who commute more than fifteen miles to school is no more than 25%.
Use a two proportion z-test to perform the required hypothesis test. State the conclusion.
Data were collected for a sample of 64 customers. Assume a population standard deviation of $6. At 95% confidence, what is the margin of error?
when 12 bolts are tested for hardness their indexes have a standard deviation of 41.7. test the claim that the
Media Disk, Inc. duplicates over a million 3.5" floppy disks each year by copying masters to stacks of blank disks. The company buys its blank stock from two different suppliers, A and B.
the sales of a grocery store had an average of 8000 per day. the store introduced several advertising campaigns in
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
a bureau of national affairs survey found that 79 of employers provide their workers a two-day paid thanksgiving
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
downs and abwender 2002 found neurological deficits in soccer players who are routinely hit on the head with soccer
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