This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Standardize and Use Table o More/less than 3 standard deviations arent realistic o Sampling error is not a plausible explanation for low sample mean Non-sampling error Selection-bias, or lying about parameters Sales Training Example o We dont know what the shape is, but it doesnt matter according to the Central Limit Thoerem o Expected mean to increase by 15 but not standard deviation o Slide 18 Sampling distribution of the difference of the means Sampling error cant explain the difference Difference Between Two Means o Combining bell-shaped distributions gives another bell-shaped distribution o As long as it is a linear combination Mean and Variance of Sampling Distribution of Difference o In order for the difference of the two to be bell-shaped, both means need to independently produce a bell-shaped distribution...
View Full Document
- Fall '11