Question 1051832
The binomial random variable has an event that either occurs or does not occur. If it occurs we call it a success. If it doesn't we call it a failure.

In your problem P(full-time) is a success.
p=0.22
n = 16
Therefore, the expected number of successes:
np = 16(0.22) = 3.52
Variance = np(1-p) = 16(0.22)(1-0.22) = 16(0.22)(0.78) = 2.7456
Standard deviation: sqrt of variance = sqrt(2.7456) = 1.657