A company services home air conditioners. It is know that times for service calls follow a...
A company services home air conditioners. It is know that times for service calls follow a normal distribution with a mean of 60 minutes and a standard deviation of 10 minutes.
d) Find the shortest range of times that includes 50% of all service calls.
e) A random sample of four service calls is taken. what is the probability that exactly two of them take more than 65 minutes?
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