Question: Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1), what is the probability that:

a. Z is between -1.57 and 1.84?

b. Z is less than -1.57 or greater than 1.84?

c. What is the value of Z if only 2.5% of all possible z values are larger?

d. Between what two values of Z (symmetrically distributed around the mean) will 68.26% of all possible Z values be contained?