The number of leaves on apple seedlings aged 2 months followed a normal distribution, the average was 12 sheet with a standard deviation of 2. What is the % of plant seeds that have                                                                  a. at least 10 sheets b. between 10 to 12 sheets c. more than 14 sheets.

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.