
A bell-shaped curved implies a normal distribution. By using our empirical rule calculator, we see that:
99.7% of all normal distribution values lie within 3 standard deviations of the mean.
This means the percent of scores less than 55 which is 3 standard deviations away from the mean is:
100% - 99.7% = 0.3%
ncG1vJloZrCvp2O6osDHnJylnZKntrXFjZympmeTpLquwc2iq7JnpJ2%2Fpq3DrGainl2ptaZ5w6KqraqZl8K1tc6nZKieXZ6%2Bbr%2FCqKmeq12ewG6uxKWjZquYlr2msIywoK2gXZZ6rrHAp2Sonl1mfXF5wKebZpldqMGiusOaqZ1llJrDqq3ToqanZZ%2BbenKBjW1waWpf