Probabilites

Probabilities (6 points) For the following problems, you should assume all populations are normally distributed. 18. What is the probability of randomly selecting an individual from a normal distribution with a z-score less than 0? (1 point) 19. What proportion of a normal distribution consists of z-scores greater than z = 1.67? (1 point) 20. What z-score separates the top 33% of the data from the rest? (1 point) 21. What z-scores separate the middle 80% of the data from the rest? (1 points) 22. What is the probability of selecting a z-score between z = 0 and z = 0.5? (2 points)