Unformatted text preview: MOE does not accommodate errors due to sampling bias. A sample size may be chosen to target a desired MOE. n= (z*sd/m)^2. If n=103.2, then you take 104. Hypothesis or significance test assesses the truth of a hypothesis about a parameter by comparing it with observed data. Ho- Null hypothesis; status quo in terms of the parameter. Ha- Alternative hypothesis; suspicion (could be greater than, less than [one sided], or not equal to Ho. [two sided]) Select a test statistic x^ and calculate P-value- measures the compatibility of the data with Ho. The smaller the P-value, the stronger the evidence in favor of Ha. The p value is normsdist of the z value. The distance from x^ to Ho is in units of sd. Compare the P-value to the desired significance level in order to conclude....
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- Fall '10
- Statistics, Statistical hypothesis testing, confidence interval supplements, Ho- Null hypothesis