Invent a sample of size 5 for which the sample mean is 20 and the sample median is 15.

To answer this specific problem:

A sample size of 5 for which the sample mean is 20 and the sample median is 15 would be 9, 12, 15, 25, and 39. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

The exact cost is $19080.37992

Step-by-step explanation:

C(x) = 18000+700x-80x^2

x = 2001/1000 = 2.001

C(2.001) = 18000+700(2.001)-80(2.001)^2 = 18000+1400.7-320.32008 = $19080.37992