More about the normal approximation to a binomial distribution.

1. We're going to
warm up this
morning with a
wee little quiz ...
really, just a little
one ... only three
questions ... it's
not that bad ...
honest. ;-)

2. (1) Find the percent of z-scores in a normal distribution (non-standard)
with μ = 75 and σ = 10 that are between:
(a) 70 and 80
(c) less than 69
(b) greater than 71

3. (2) Find the probability that a randomly selected individual has an IQ
between 108 and 130, if the population is distributed normally with a
mean of 100 and standard deviation of 16. Write your answer in
decimal form rounded to three decimal places. Include a sketch with
your answer.