If a real-valued attribute is normally distributed, we know that approximately 95% of all attribute values lie within
A) one standard deviation of the mean.
B) two standard deviations of the mean.
C) three standard deviations of the mean.
D) four standard deviations of the mean.

Question

Quizplus · Accepted Answer

According to the empirical rule, approximately 95% of all attribute values lie within two standard deviations of the mean for a normally distributed attribute.

If a Real-Valued Attribute Is Normally Distributed, We Know That