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Posts Tagged ‘confidence intervals’
Eliminating the Fear About Using Confidence Intervals
Help Green Belts use statistical analysis by emphasizing not only when and why a tool or methodology is used but also what the data says in "plain English." Memorizing complex formulas is not necessary, but basic formulas, should be shared.
Margin of Error and Confidence Levels Made Simple
Most surveys draw their conclusions from a sampling a larger group. How well the sample represents the larger population is gauged by two important statistics which quality professionals should understand the margin of error and confidence level.
Sample Correctly to Measure True Improvement Levels
In sampling, a comparatively small number of customers, called a sample, is used to draw conclusions about a population. Although this method saves time and money, it comes with a higher margin of error that must be taken into consideration.
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