Empirical Rule: For a symmetrical bell shaped cure
The probability of a data point being within +/- one standard deviation is 68%
The probability of a data point being within +/- two standard deviation is 95%
The probability of a data point being within +/- three standard deviation is 99.7%
What is the probability of finding a data point between - 1 standard deviation and 2 standard deviations?
Provide an explanation, in short precise language explaining how you determined your answer.