RMB p11

QN=140 What are the distinguishing features of simple random sampling?

• a. (i) Random numbers determine which elements are included in the sample.
• b. (ii) Each possible sample of a given size has a known and equal probability of being the sample actually selected.
• c. (iii) Each element in the population has a known and equal probability of selection.
• d. All of (i), (ii), and (iii).

QN=141 Snowball sampling can help the researcher to:

• a. (i) theorise inductively in a qualitative study.
• b. (ii) overcome the problem of not having an accessible sampling frame.
• c. (iii) access difficult or hidden populations.
• d. all of (i), (ii), and (iii).

QN=142 Which of the following governs your choice of sample size?

• a. (i) The confidence level and the tolerable margin of error.
• b. (ii) The types of analyses.
• c. (iii) The size of the total population.
• d. All of (i), (ii), and (iii).

QN=143 The cluster random sampling technique involves several steps. Which of the following steps has the WRONG position? Randomly select some clusters Choose the cluster grouping criteria Divide the population into clusters Collect the selected clusters to have the desire sample

• a. Randomly select some clusters.
• b. Choose the cluster grouping criteria.
• c. Divide the population into clusters.
• d. Collect the selected clusters to have the desire sample.

QN=144 The stratified random sampling technique involves several steps. Which of the following steps has the WRONG position? Divide the population into discrete strata. Randomly select elements in each stratum. Choose stratification variables. Collect the selected elements to have the desired sample.

• a. Divide the population into discrete strata.
• b. Randomly select elements in each stratum.
• c. Choose stratification variables.
• d. Collect the selected elements to have the desired sample.

QN=145 Which of the following is NOT a probability sampling technique?

• a. Stratified sampling.
• b. Cluster sampling.
• c. Systematic sampling.
• d. Snowball sampling.

QN=146 What is a sampling unit?

• a. The population.
• b. All the individual elements of the final sample, drawn together.
• c. The basic unit containing the elements of the population to be sampled.
• d. The method used to collect the sample.

QN=147 Which of the following is NOT a type of non-probability sampling?

• a. Snowball sampling.
• b. Cluster sampling.
• c. Judgemental sampling.
• d. Convenience sampling.

QN=148 Which of the following techniques will help to get a representative sample?

• a. Extreme case sampling.
• b. Systematic sampling.
• c. Heterogeneous sampling.
• d. Critical case sampling.

QN=149 Which of the following is NOT true of probability sampling?

• a. Sampling units are selected by chance as opposed to the judgement of the researcher.
• b. Estimates are statistically projectable to the population.
• c. It is possible to specify the probability of selecting any particular sample of a given size.
• d. The results will always be more accurate than non-probability sampling.