2) Key Concepts In Statistic

Question 1

Statistical method

Answer 1

• descriptive: summarize and simplify information
• Modeling: create models to understand complex relation in data
• Inference: evaluate precision and generalize results

Question 2

Numerical (quantitative) variables

Answer 2

• continuous: variable can assume any value within an interval (eg: weight)
• Discrete: Variable can assume integer values (eg: # of previous pregnancies)

Question 3

Categorical (qualitative) values

Answer 3

• Ordinal: categories have a natural order (eg: severity of asthma)
• Nominal: categories are not ordered (eg: blood type)

Question 4

Descriptive measures

Answer 4

• frequency
• central tendency and position
• dispersion

Question 5

Graphs

Answer 5

• used in presentation
• easy to read but not precise
• show trends or patterns

Question 6

Table

Answer 6

• employed in written documents

- can present more information and precise value