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The imporrtance of collecting data randomly

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The reading material speaks about collecting data to create control charts or determining process capabilities. Why is it important to ensure that the data is randomly collected?

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An essay describing the importance of collecting data randomly

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When collecting data for statistical inferences about anything, whether it be polls, for marketing data, or to analyze a process, the data collected must be done so randomly so as to ensure that the sample is an accurate representation of the population at large. Biases, ...

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