Pre-Test on statistics.

1. Take advantage of
today's pre-test.
Don't let this
be you.
The truth brings no answers sometimes by flickr user Modern Times

2. (1) The scores on the Applied Math exam are normally distributed with a mean
of 68 and a standard deviation of 14.6. If 8% of the students with the lowest
scores fail, determine the pass mark for this exam.
(a) 45 (b) 47 (c) 50 (d) 53

3. (2) An inspection procedure at a manufacturing plant involves picking thirty
items at random and then accepting the whole lot if at least twenty-five of the
thirty items are in perfect condition. If in reality 85% of the whole lot are
perfect, what is the probability that the lot will be accepted?
(a) 0.186 (b) 0.476 (c) 0.524 (d) 0.667 (e) 0.711