17. the scores on a test have a mean of 100 and a standard
deviation of 15. if a personnel manager wishes to select
from the top 75% of applicants who take the test, find the
cutoff score. assume the variable is normally distributed.

Over the course of the school year, you keep track of how much snow falls on a given day and whether it was a snow day. your data indicates that of twenty-one days with less than three inches of snow, five were snow days, while of the eight days with more than three inches of snow, six were snow days. if all you know about a day is that it is snowing, what is the probability that it will be a snow day?