Statistical Inferences for the Variance

Statistical Inferences for the Variance - tatistical...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: tatistical Inferences for Variance Statistical Inferences for Variance Objectives: earn to compare variance of a sample with Learn to compare variance of a sample with variance of a population earn to compare variance of a sample with Learn to compare variance of a sample with variance of another sample troduce chi- quared distribution Introduce chi squared distribution Introduce F-distribution Comparing a Sample Variance with a Population Variance If a manager were trying to make a process output less variable, they could take a sample from the changed process and compare it with known data from the old process. It can then be determined if the new process is significantly less variable than the old process. Comparing a Sample Variance ull hypothesis is that the new variance is with a Population Variance Null hypothesis is that the new variance is equal to the old variance Alternative hypothesis is that the new population variance is smaller than the old variance One sided test Comparing a Sample Variance with...
View Full Document

Page1 / 9

Statistical Inferences for the Variance - tatistical...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online