FM015 Part A_2

Categorise each of the following variables as Continuous

• Age of 5 years

• Time of 2.5 hours

• Output of 12,000 kg

• Output of 5,000 units

The essence of systematic sampling is that:

• Each element of the population has an equal chance of being chosen

• Members of various strata are selected by the interviewers up to predetermined limits

• Every nth member of the population is selected

• Every element of one definable subsection of the population is selected

A sample is taken by dividing the population into different age bands and then sampling ramdomly from the bands, in proportion to their size. What is such a sample called?

• Simple random

• Stratified random

• Quota

• Cluster

A large company wants to survey the opinions of employees using cluster sampling. Which of the following methods should be used?

• Staff are randomly selected from each department in proportion to departmental size

• Staff are selected from the list of employees, taking every nth name

• A sample, which is as representative as possible of the composition of the staff in terms of gender, age and department is taken by stopping appropriate staff in the corridors and canteen

• One department is selected and all the staff in that department are surveyed

Every 10th person is chosen randomly from each ward in a hospital

• Cluster

• Stratified

• Systematic

• Quota

One person in ten is chosen from an alphabetical list of employees.

• Stratified

• Cluster

• Systematic

• Quota