The following figure is a probability density curve that represents the grade point averages (GPA) of the graduating seniors at a large university. Area = 0.64 Area = 0.23 3.3 3.7 4.1 4.5 4.9 Part 1 of 2 Find the proportion of seniors whose GPA is between 4.1 and 4.5. The proportion of seniors whose GPA is between 4.1 and 4.5 is Part 2 of 2 What is the probability that a randomly chosen senior will have a GPA greater than 4.5? The probability that a randomly chosen senior will have a GPA greater than 4.5 is Use the TI-84 Plus calculator to find the z-scores that bound the middle 80% of the area under the standard normal curve. Enter the answers in ascending order and round to two decimal places. The z-scores for the given area are and A normal population has mean = 9 and standard deviation = 5. (a) What proportion of the population is less than 19? (b) What is the probability that a randomly chosen value will be greater than 4? Round the answers to four decimal places. Part 1 of 2 The proportion of the population less than 19 is Part 2 of 2 The probability that a randomly chosen value will be greater than 4 is