Author Question: One goal of stratified sampling plans is to decrease the amount of variability in each stratum. This ... (Read 47 times)

geoffrey · **on:** Jun 28, 2018

One goal of stratified sampling plans is to decrease the amount of variability in each stratum. This can be accomplished by
a. making the strata internally heterogeneous.
b. increasing the amount of sampling error.
c. decreasing the magnitude of the overall sample mean.
d. making the strata internally homogeneous.
e. using a 99 confidence level instead of a 95 confidence level.

Question 2

Among the things that marketers have learned about SMM is:
a. it is essentially free.
b. it works well as a single channel of communications.
c. it works best when used in an ad hoc fashion.
d. None of these is correct.