1.What is the estimated value of Z = 3.99?

2.Suppose MNAT scores follow a normal distribution. The Math scores have a mean of 500 with a standard deviation 120, and the English scores have an average of 520 with a standard deviation of 100. If you scored 610 in Math and 620 English, which score is more impressive compared to the population?

3.A distribution of data has a mean of 15 and a standard deviation of 2. How many standard deviations away from the mean is a value of 13?

4.You are creating a tree house and have made the doorway into the structure 71 inches tall. Suppose the average height of adult males is 68 inches with a standard deviation of 3 inches. What percentage of men must bend their heads to get into the house?