Question
The shape of the distribution of the time required to get an oil change at a 10-minute oil-change facility is unknown.However, records indicate that the
The shape of the distribution of the time required to get an oil change at a 10-minute oil-change facility is unknown.However, records indicate that the mean time is 11.2minutes, and the standard deviation is 3.9minutes. Complete parts(a) through(c) below.
Click here to view the standard normal distribution table (page 1).LOADING...
Click here to view the standard normal distribution table (page 2).LOADING...
(b) What is the probability that a random sample of n=40 oil changes results in a sample mean time less than 10 minutes?
The probability is approximately
.
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Applied Calculus
Authors: Stefan Waner, Steven Costenoble
7th Edition
1337514306, 9781337514309
