With regards to a standard normal distribution complete the following:
(a)Find P(z 0.5
(b)Find P(z > 1), the proportion of the standard normal distribution above the z-score of 1.
(d)Find P( z
(e)Find the z-score that separates the lower 90% of standarized scores from the top 10% . . . that is find the z-score corresponding to P90, the 90th percentile value.