Question

part 1.You have a population of 2607 families. You list them in alphabetical order by surname. Using a random number table, each family is assigned a number, and a percentage of families for each letter of the alphabet are selected. Does this sampling procedure make use of chance? a. Yes b. No c. Can’t tell

part 2. Another researcher is planning a different survey of families, this time, all from Northumberland. Using census lists and details of the major towns in Northumberland, the sampling procedure is to obtain a random sample of families from each of the major towns and cities in the county. This type of study will give comparative information which a simple random study cannot? a. True b. False .

Part 3. Sampling techniques which use probability techniques are successful ways to eliminate participant bias. a. True b. False

Answer 1

Part 1:

b. No

This sampling procedure does not make use of chance because each member of the population does not have a equal chance of being selected. For example, there are more chances of a family being selected whose surname starts with the letter 'X' because that is rare.

Part 2:

a. True

The main advantage with stratified sampling is how it captures key population characteristics in the sample.

Part 3.

a. True

Sampling techniques which use probability techniques ensure that each participant gets an equal chance of being selected thus eliminating participant bias.