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Your name and that of a friend is included in a raffle drawing. For the raffle, two tickets will be drawn, and those whose names are on the tickets win a prize. Compute the following probabilities.
1. The probability that your friend wins.
2. the probability that both you and your friend wins.
3. the probability that either you or your friend (or both) win.
4. The probability that you win but your friend does not.
A random sample of 81 credit sales in a department store showed an average sale of $68.00. Historically, it is known that the standard deviation of the population is $27.00.
Explain why the t distribution is used as a part of the confidence interval.
Assume that customers arrive completely randomly, one at a time, at the rate of 15 per hour. Calculate the operating characteristics of interest to the manager.
Researchers at the Cornell University Food and Brand Lab conducted an experiment at a fitness camp for adolescents (Wansink & van Ittersum, 2003).
a popular doughnut shop makes 5000 doughnuts per day of which 30 1500 doughnuts have chocolate icing. andy likes
A researcher tested the reading ability of two groups of primary care patients. The scores on the test range from 1 to 9 with 9 indicating a high degree of reading ability and 1 very limited reading ability.
1. which variable has the weakest relationship with the quadriceps strength index 120degs? provide a rationale for your
the name of each contestant is written on a separate card the cards are placed in a bag and three names are picked
The mileage per day is distributed normally. Find the probablitly that a truck drives at least 133 miles in a day. Round your answer to 4 decimal places.
determine the probability of accepting lots that are 10 percent 20 percent 30 percent and 40 percent defective using a
the national center for health statistics reported that of every 883 deaths in recent years 24 resulted from an
A company that has a large number of supermarket grocery stores claims that customers who pay by personal checks spend an average of $87 on groceries at these stores with a standard deviation of $22.
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