Unformatted text preview: and the standard deviation is 2. You know that that distribution is normal. You observe an x-value of 6. Find the z-score for the observed x=6. Is the value unusual? EXPLAIN! σ μ-= x z = 2 10 6-= 2 4-= -2.0 Apply 68-95-99.7 or z-table. Look for value as or more extreme. z-table area lower than -2 is 0.0228 or 2.28%. By 68-95-99.7, you would find the area is 2.5% or 0.025. Thus, the value does seem somewhat unusual....
View Full Document
This note was uploaded on 05/05/2010 for the course STAT 226 taught by Professor Abbey during the Fall '08 term at Iowa State.
- Fall '08