Lesson: The Normal Distribution

For the normal distribution shown, approximately what percent of data points lie in the shaded region?

For the normal distribution shown, approximately what percent of data points lie in the shaded region?

A crop of apples has a mean weight of 105 g and a standard deviation of 3 g. It is assumed that a normal distribution is an appropriate model for this data. What is the approximate probability that a randomly selected apple from the crop has a weight between 99 g and 111 g?