STAT 220 Midterm: stat 3 stuy guide

What method is used to manage contention-based access on a wireless network?

1. CSMA/CD
2. priority ordering
3. CSMA/CA
4. token passing

13. If the matrix expression ABT - (CA-1)T is defined, where A is n xn invertible, B is p xs, and C is q xt, then only one of the following is a necessary restriction on n, P, 8, 9, and t. Indicate which one. A) B) n=p=s=q=t. n=s=q and p=t. n=s= t and p=q. P=s=n and q=t. D)

The relative frequency of a class is computed by

a. dividing the midpoint of the class by the sample size.
b. dividing the frequency of the class by the midpoint.
c. dividing the sample size by the frequency of class.
d. dividing the frequency of the class by the sample size.