The variance of a sample of 169 observations equals 576 . The standard deviation of the sample equals
a. 13.
b. 24.
c. 576.
d. 28,561.
Question 2
Infeasibility means that the number of solutions to the linear programming models that satisfies all constraints is
a. at least 1.
b. 0.
c. an infinite number.
d. at least 2.