1.

A local municipal council researcher wishes to estimate the proportion of ratepayer residents who are satisfied with the council's proposed budgetary plan for the coming financial year. In order to obtain a representative sample of ratepayers, he intends to conduct a census of the households of a typical neighbourhood street in the locality. Which of the following best describes the proposed sampling method used?

A. Systematic

B. Stratified

C. Cluster

D. Simple Random

2.

Which of the following situations, all else staying the same, leads to an increase in the margin of error when constructing an interval estimate of a population mean (if the population standard deviation is unknown)?

A. If the sample standard deviation decreases.

B. If the level of confidence increases.

C. If the sample mean increases.

D. If the sample size increases.