Friday
October 31, 2014

Homework Help: Statistics

Posted by Brandon on Monday, December 17, 2007 at 5:18pm.

Background: A machine cuts wood boards to a thickness of 25 millimeters with an accepter margin of error of +/-0.6 ml. (Assume process can be distributed by normal distribution.) The acceptable range of thicknesses for the boards is 24.4 ml to 25.6 ml, inclusive.

Because of vibration, the machine shifts from 25 ml. To check the machine, you select at random three samples of four boards and find the mean thickness of each.

You select a board. Assume the machine shifts and is cutting boards with a mean thickness of 25.4 ml and a standard deviation of .2 ml.

Question: What is the probability that you select a board that is not outside the acceptable range?

Question: You randomly select 12 boards. What is the probabiliy you select at least one boards that is not outside the acceptable range?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Statistics - The design tolerance thickness for an automotive part is 55mm to ...
Help with statistics - The design tolerance thickness for an automotive part is ...
Statistics - Consider a machine that fills soda bottles. The process has a mean ...
Statistics- Math - Assume that a random sample is used to estimate a ...
Statistics - The monthly incomes from a random sample of workers in a factory ...
Algebra 2: Prob and Stats - A survey of 480 high school students found that 37% ...
Statistics - A soft drink vending machine is supposed to fill cups with pop. The...
Statistics - Suppose a certain species bird has an average weight ofx=3.55 grams...
Statistics - Which of the following statements are correct? 1.A normal ...
statistics - Which of the following statements are correct? a. a normal ...

Search
Members