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What is Xbar Critical and Xbar observed? What is the difference between the two? How are...

What is Xbar Critical and Xbar observed? What is the difference between the two? How are they both calculated?
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The x-bar observed is used for the sample mean statistics. It is used to estimate the true population parameter .once a population is identified and the attribute that will be measured decided, we use a random sampling method to select a sample of at least 30 observations.and we calculate arithmetic mean to calculate x bar observed.

use the equation given following to calculate x bar critical

For given value of meam , standard deviation amd sample size and z score,we calculate x .

This solution is called the critical xbar value, or more simply, the critical value..

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