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A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years ("Appliance life expectancy," 2013). Assume the life of a dishwasher is normally distributed.
a.) State the random variable.
b.) Find the probability that a dishwasher will last more than 15 years.
c.) Find the probability that a dishwasher will last less than 6 years.
d.) Find the probability that a dishwasher will last between 8 and 10 years.
e.) If you found a dishwasher that lasted less than 6 years, would you think that you have a problem with the manufacturing process? Why or why not?
f.) A manufacturer of dishwashers only wants to replace free of charge 5% of all dishwashers. How long should the manufacturer make the warranty period?
Criticize the following definitions in light of the eight rules for lexical definitions:- A symphony is a musical piece written for full orchestra.
the national sporting goods association conducted a survey of persons 7 years of age or older about participation in
1 give the equation for the standard deviation of a random variable x over an entire population with probability mass
1. If the sampled population has a mean 48 and standard deviation 18, then the mean and the standard deviation for the sampling distribution of X (X-bar) for n=9 are:
solve the following problem by showing your work.the following shows the impact of three different types of head start
In this context, describe the Type I error possible. How might such an error impact ABI Insurance? In this context, describe the Type II error possible. How might such an error impact ABI Insurance?
When studying simultaneous responses to two categorical questions, we should set up a a) contingency table. b) frequency distribution.
a population has a known standard deviation of 25. a simple random sample of 49 items is taken from the selected
To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $300 per semester.
Explain the importance of random sampling. What problems/limitations could prevent a truly random sampling and how can they be prevented?
If the bank is charging customers 7.00 percent APR, how much would it be willing to lend the business owner?
Find at least what percentage of all homeowners in this city pay a monthly mortgage of 865 to 1,675.00.
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