In an attempt to reduce the number of person-hours lost
as a result of industrial accidents, a large production
plant installed new safety equipment.
In a test of the effectiveness of the equipment, a random
sample of 44 departments was chosen. The number of person-hours
lost in the month prior to
and the month after the installation of the safety equipment was
recorded and the percentage change was calculated. Find the
probability that the test
is unable to conclude that the new safety equipment is effective
when the mean percent reduction is actually 0.6%. Assume that the population standard
deviation is 10% and that is 0.08.
P(Type II Error) =