old_DATA4200 - Week 4 :)

What is an example of semi-structured data?

• .txt file

• Excel

• JSON file

• Video or image

When the sample does not accurately reflect the population, it is called:

• Sampling bias

• Non-response bias

• Response bias

• Measurement bias

How it's called the technique in which an expert defines the representative sample?

• Quota sampling

• Purposive sampling

• Random sampling

• Stratified sampling

What is the systematic sampling?

• It divides the population into similar groups and take a random sample

• It's the difference between a measurement in a sample and population

• It uses a fixed interval to select members from a sampling frame

• It only includes the individuals who are convenient

What's a benefit of having a sample in a world of Big Data?

• It provides the depth of information

• It allows to discover new target groups

• You have more variables to analyse

• It reduces cost and processing time