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To boost holiday sales, a jewelry store in Bismarck, North Dakota, is advertising the following promotion: "If more than eight inches of cumulative snow fall on December 24, 25, 26, 27, and 28, you get your money back on all purchase made on December 17." To analyze this promotion, the store manager has collected data and determined that snowfall over this 5-day period in December is normally distributed with an average of 6.4 inches and standard deviation of 0.566 inches.
What is the probability that the store will have to refund the money to its December 17 customers?
If required, round your answer to four decimal places.
An official of the Iowa Department of Highways wants to compare the useful life, in months, of two brands of paint used for striping roads. The mean number of months Cooper Paint lasted was 36.2 with a standard deviation of 1.114 months.
It is estimated that 3% of the athletes competing in a large tournament are users of an illegal drug to enhance performance. The test for this drug is 90% accurate.
Standard deviation of 24 min. What is the probability that a random sample of n=15 batteries results in a mean talk time of at least 330 minutes?
The average credit card debt for college seniors is $3,262. If the debt is normally distributed with a standard deviation of $400, find probabilities. that the senior owes at least $1,000
you are the manager of a restaurant for a fast-food franchise. last month the mean waiting time at the drive-through
Aircraft are used to sow seed and to spread fertilizer.
The file tax contains the quarterly sales tax receipts (in thousands of dollars) submitted to the comptroller of the village fair lake for the period of ending March 2011 by all 50 Business establishments in that locale
The average monthly cot for a studio apartment in NYC is reported to be $1,000. You want to prove that average monthly rent is not what is stated.
What is meant by the probability of an event? Discuss how addition and multiplication techniques are used to solve probability problems.
What sample size and acceptable level would result in a probability of .05 that a good batch will be rejected and a probability of .10 that a bad batch will be accepted?
Standard deviation of 8.3 minutes. Assuming normality, at the a = .05 level, is there enough evidence to show the mean oil change time is different?
A sample of 50 provided a sample mean of 14.15. The population standard deviation is 3.
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