Posted by **Anonymous** on Monday, October 11, 2010 at 10:39pm.

You want to determine if your widgets from machine 1 are the same as machine 2. Machine 1 has a sample mean of 5 and a population standard deviation 1 and a sample size of 4. Machine 2 has a sample mean of 8 and a population standard deviation of 2 with a sample size of 4. With an alpha of .05 can we claim that there is a difference between the output of the two machines. Which of the following statements are true?

- statistics -
**de**, Wednesday, October 29, 2014 at 12:16pm
none

- probability -
**Tofik**, Tuesday, April 26, 2016 at 5:04am
7 A company has three machines A, B and C which all produce the same two parts, X and

Y. of all the parts produced, machine A produces 60%, machine B produces 30%, and

machine C produces the rest. 40% of the parts made by machine A are part X, 50% of the

parts made by machine B are part X, and 70% of the parts made by machine C are part X.

A part produced by this company is randomly sampled and is determined to be an X part.

With the knowledge that it is an X part, find the probabilities that the part came from

machine A, B or C.

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