# E is it unusual for a person in china to have a blood

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e.)Is it unusual for a person in China to have a blood pressure of 135 mmHg? Why or why not?
f.)What blood pressure do 90% of all people in China have less than?
6.3.8A 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?
The mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about 69 mm ("Annual maximums of," 2013). Assume rainfall is normally distributed.a.)State the random variable.
b.)Find the probability that the yearly rainfall is less than 100 mm.
c.)Find the probability that the yearly rainfall is more than 240 mm.
d.)Find the probability that the yearly rainfall is between 140 and 250 mm.