UNIT 2 - Research methodology

Question 1

Theory

Answer 1

• A general thought about a topic
• An established principle to explain a phenomena
• A systematic belief about a phenomena
• An inductive approach to the natural world

Question 2

Probability sampling

Answer 2

Simple random sampling

Systematic sampling

Stratified sampling

Cluster sampling

Question 3

Non-probability sampling

Answer 3

Snowball sampling

Quota sampling

Judgement sampling

Convenient sampling

Question 4

Reliability

Answer 4

Is used to describe the overall consistency of a measure. If an individual takes the same blood test several times and always receives the same results, the test is reliable. Thus, a measure is said to have a high reliability.

Example, measurements of people’s weight are often extremely reliable

Question 5

Validity

Answer 5

A test is valid if it measures what it is supposed to measure. If an HIV blood test read that an individual had syphilis, then the test would be invalid.

Question 6

Reliability and validity are independent of each other. True or false?

Answer 6

True

For example, every time the HIV blood test is conducted, it states that the individual has syphilis which means it is reliable, but it is not valid as the test is meant to test for HIV.