The main characteristics of Normal Distribution are the average/mean and the standard deviation. In the distribution above, the average is 69 inches, and the standard deviation is 3 inches. According to Empirical Rule 68-95, 68% of all adult males in the US have a height between 66 and 72 inches. 95% of all adult males in the US have a height between 63 and 75 inches.

Use Empirical Rule 68-95 and find the probability that the height of adult males in the US is: 1) between 66 and 69 inches, 2) greater than 75 inches. Use online Normal Distribution Calculator https://www.hackmath.net/en/calculator/normal-distribution and find the probability that the height of adult males in the US is: 3) less than 70 inches, 4) greater than 73 inches, 5) between 64 and 74 inches.