Descriptive Statisticshard
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When continuous data is grouped into equal-width class intervals of width , the variance calculated from the group midpoints, , tends to overestimate the true variance . Which of the following formulas represents Sheppard's correction to obtain an unbiased estimate of the true variance?
When continuous data is grouped into equal-width class intervals of width , the variance calculated from the group midpoints, , tends to overestimate the true variance . Which of the following formulas represents Sheppard's correction to obtain an unbiased estimate of the true variance?