10(n^2+n) -6 (n^2 - 2). simplify the following
1 answer:
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Solution:
~Multiply
-4/5 * -5/8 = 20/40
~Simplify
20/40 = 1/2
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Answer:
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Answer:
(a) Probability that a random sample of n = 45 oil changes results in a sample mean time < 10 minutes i=0.0001.
(b) The mean oil-change time is 15.55 minutes.
Step-by-step explanation:
Let us denote the sample mean time as x
From the Then x = mean time = 16.2 minutes
The given standard deviation = 3.4 minutes
The value of n sample size = 45
CHECK THE ATTACHMENT FOR DETAILED EXPLANATION
