So E is not the correct answer. A z-score can apply to a non-normal distribution. So the answer is C. And I guess that's a good point of clarification to get out of the way. I thought I would do two problems in this video just because that one was pretty short. So problem number six, the heights of fifth grade boys in the United States is approximately normally distributed. That's good to know. With a mean height of 143.5 centimeters, so it's a mean of 143.5 centimeters, and a standard deviation of about 7.1 centimeters, standard deviation of 7.1 centimeters, what is the probability that a randomly chosen fifth grade boy would be taller than 157.7 centimeters?