Chapter 6, Problem 4PS

Given a standardized normal distribution (with a mean of 0 and a standard deviation of 1, as in Table E.2), determine the following probabilities:

$\begin{array}{l}\text{a}\text{.}\text{P}(Z>1.08)\\ \text{b}\text{.}\text{P}(Z<-0.21)\\ \text{c}\text{.}\text{P}(-1.96<Z<-0.21)\\ \text{d}\text{.}\text{what is the value of Z if only 15}\text{.87}\text{percent}\text{all}\text{possible}Z\text{values}\text{are}\text{larger?}\end{array}$