13-2. The ACE Dairy Co. has developed what it calls an improved and more flavorful variety of vanilla ice cream. It offers a free sample to its customers and asks them if they would switch to this new variety of vanilla ice cream.

A “yes” response is denoted as “a” and a “no” answer is recorded as “b.”

Can the following sequence of responses appear to be a random sample?

Use α = 0.05.

a/bb/aaa/b/a/bbbb/a/b/a/bb/a/bbb/aaa/bb/a/bb/aa/bbb/a/b/aa