Systolic blood pressure readings are normally distributed with a mean of 121 and a standard deviation of 12. If a person from the population was selected at random, find the probability that their blood pressure is in the acceptable range (between 114 and 140) for athletic activity.

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.