Scores on the TTICK test are normally distributed with mean of 127 and a std. deviation of 12. If one student takes the TTCK test, what is the probability that the student will score between 122 and 132?

a.

.3256

b.

.9778

c.

.6700

d.

.8198

e.

.1340

Part 2. Using the TTICK test mean and standard deviation from the previous question, if sixteen students take the TTICK test, what is the probability that the mean score of the sixteen students is between 122 and 132?

a.

.1342

b.

.4972

c.

.6700

d.

.9778

e.

.9050

Part 3.

Again using the TTICK data from the previous question, find the probability that the mean of a class of sixteen students will exceed 130.

a.

.1587

b.

.6972

c.

.4013

d.

.9812

e.

.0071