Choose the required sample size below. A.
The sample size needs to be greater than 30.B.
The normal model cannot be used if the shape of the distribution is unknown.C.
The sample size needs to be less than 30.D.
Any sample size could be used.
Is there anything else important you think the Math Tutor should know?
What is the probability that a random sample of n
equals
=
35
35 oil changes results in a sample mean time less than
10
10 minutes? The probability is approximately nothing
.
(Round to four decimal places as needed.)
(c) Suppose the manager agrees to pay each employee a $50 bonus if they meet a certain goal. On a typical Saturday, the oil-change facility will perform
35
35 oil changes between 10 A.M. and 12 P.M. Treating this as a random sample, at what mean oil-change time would there be a 10% chance of being at or below? This will be the goal established by the manager.There would be a 10% chance of being at or below nothing
minutes.
6 years ago
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