Lecture 4

Question 1

Observation study meaning

Answer 1

investigation where data are collected and analysed without performing interventions or variable control (used when experiments are impractical or unethical)

Question 2

When is data considered big

Answer 2

1. large amount of data
2. typically digital format
3. should be analyzable in an efficient way with computational tools

Question 3

Data mining meaning

Answer 3

Finding useful patterns in very large sets of data