If a histogram of a data set is symmetric and bell shaped,with a mean of 75 and standard deviation of 10.Then,approximately 95% of the data values will be between 55 and 95.

Question

Quizplus · Accepted Answer

This follows the empirical rule (68-95-99.7 rule) for a normal distribution, where approximately 95% of the data falls within two standard deviations of the mean. Here, two standard deviations from the mean (75) are 75 ± 2(10) = 55 to 95.

If a Histogram of a Data Set Is Symmetric and Bell