If a data set has a bell-shaped distribution, approximately what proportion of the values lie above the mean and within two standard deviations?

Question

Quizplus · Accepted Answer

In a bell-shaped (normal) distribution, about 68% of the data lies within one standard deviation of the mean, and about 95% lies within two standard deviations. This means approximately 95% of the data is within two standard deviations of the mean, with roughly half (about 47.5%) above the mean and half below. Therefore, approximately 48% of the values lie above the mean and within two standard deviations.

If a Data Set Has a Bell-Shaped Distribution, Approximately What