The percentage of scores that fall within 1 standard deviation of the mean is ______.

A) 99.5%
B) 68%
C) 50%
D) 95%

Standard Deviation

A measure of the dispersion or spread in a set of data; it quantifies how much the individual data points differ from the mean value.

Mean

The average of a set of numbers, calculated by adding them together and dividing by the count of numbers.

Scores

Values or data points obtained from assessments, tests, or measurements, representing the performance or achievement of an individual or group.