Question
In: Statistics and Probability
A dishwasher has a mean lifetime of 12 years with an estimated standard deviation of 1.25...
A dishwasher has a mean lifetime of 12 years with an estimated standard deviation of 1.25 years. Assume the lifetime of a dishwasher is normally distributed. Round the probabilities to four decimal places. It is possible with rounding for a probability to be 0.0000.
a) State the random variable. rv X = the lifetime of a randomly selected dishwasher Correct
b) Find the probability that a randomly selected dishwasher has a lifetime of 8.25 years or more.
c) Find the probability that a randomly selected dishwasher has a lifetime of 12.25 years or less.
d) Find the probability that a randomly selected dishwasher has a lifetime between 8.25 and 12.25 years.
e) Find the probability that randomly selected dishwasher has a lifetime that is at most 8.875 years.
f) Is a lifetime of 8.875 years unusually low for a randomly selected dishwasher? Why or why not? Select an answer
g) What lifetime do 58% of all dishwashers have less than? Round your answer to two decimal places in the first box. Put the correct units in the second box.
Solutions
orchestra answered 2 years agoRelated Solutions
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25...
A dishwasher has a mean life of 12 years with an estimated
standard deviation of 1.25 years ("Appliance life expectancy,"
2013). The life of a dishwasher is normally distributed. Suppose
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you made. a.) TRUE or FALSE: The random variable is defined as the
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A dishwasher has a mean life of 10 years with an estimated standard deviation of 1.25...
A dishwasher has a mean life of 10 years with an estimated
standard deviation of 1.25 years ("Appliance life expectancy,"
2013). Assume the life of a dishwasher is normally
distributed.
State the random variable.
Find the probability that a dishwasher will last more than 15
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Find the probability that a dishwasher will last less than 6
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Find the probability that a dishwasher will last between 8 and
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An unknown distribution has a mean of 80 and a standard deviation of 12. A sample...
An unknown distribution has a mean of 80 and a standard
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An unknown distribution has a mean of 80 and a standard deviation of 12. A sample...
An unknown distribution has a mean of 80 and a standard
deviation of 12. A sample size of 95 is drawn randomly from the
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greater than 7,650.
Suppose x has a distribution with a mean of 90 and a standard deviation of 12....
Suppose x has a distribution with a mean of 90 and a standard
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Positive behaviors on the normal curve has a mean of 12 and a standard deviation of...
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A normal distribution has a mean of u= 60 and a standard deviation of of 12....
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What is the probability that a single MUW student has a GPA
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What is the probability that 50 MUW students have a mean GPA
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