Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1, as

Question:

Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E.2), what is the probability that
a. Zis 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?

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