:3a. There are about 2,700 institutions of higher learning in
the United States (including junior colleges and community
colleges).  In 1976, as part of a continuing study of higher
education, the Carnegie Commission took a simple random sample of
size 225 from these institutions.  The average enrollment of the 
institutions in the sample was 3,700, with an SD of 6,000. <p>

A histogram for the enrollments was plotted and did not follow
the normal curve. <p>

: <p>

(i) If someone takes a simple random sample of 225
institutions of higher learning, and goes two SE's either way
from the average enrollment of the 225 sample schools, there
is about a 95% chance that this interval will cover the
average enrollment of all 2700 schools.  <p>

(ii) The normal curve can't be used to figure confidence
intervals here at all, because the data does not follow the
normal curve.  <p>

Which of the following holds? <p>

a. both (i) and (ii) are true  <p>

b. (i) is true, but (ii) may not be  <p>

c. (ii) is true, but (i) may not be  <p>

d.  both (i) and (ii) are false  <p>