Using the bell curve below, select the statement(s) below that is/are correct A bell curve is a meaningful way to illustrate standardized scores Approximately 68.2 percent of examinees scored within 1 standard deviation above and below the mean of the total population Approximately 95.6 percent of examinees scored within 2 standard deviations above and below the mean of the total population Approximately 99.7 percent of examinees scored within 3 standard deviations above and below the mean of the total population The "0" represents the dead center of the average range of standardized scores

Bell-Shaped Curve Showing Standard Deviations 68.2% of Measurements = Average + 1 Standard Deviation 95.6% of Measurements = Average + 2 Standard Deviations 99.7% of Measurements = Average + 3 Standard Deviations Average ......- 68.2% .--.... Avg. + 1 Std. Deviation ... 95.6% Avg. + 2 Std.Deviations .-. 99.79%........ Avg. + 3 Std.Deviations: -3 -2 -1 0 +1 +2 +3 Standard Deviation