Assume that the thermometer readings are normally distributed with a mean of 00C and a standard deviation of 10C for freezing water.  If one thermometer is randomly selected, find the probability that it reads (at the freezing point of water) greater than -1.75 degrees. 1 - 0.0401 2 - -0.9599 3 - 0.9599 4 - -0.0401

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.