The mean of fifty sales receipts is $65.75 and the standard deviation is $10.55. Using Chebyshev's theorem, at least 75% of the sales receipts were between $44.65 and $86.85.

Question

Quizplus · Accepted Answer

According to Chebyshev's theorem, at least 75% of the data lies within 2 standard deviations from the mean. In this case, 2 standard deviations from the mean are $65.75 + (2 x $10.55) = $86.85 and $65.75 - (2 x $10.55) = $44.65. Therefore, at least 75% of the sales receipts must have been between $44.65 and $86.85.

The Mean of Fifty Sales Receipts Is $65