Descriptive Statistics

Question 1

Central tendencies
(Middle values)

Answer 1

Mode

MEAN
💟 Average 💟
☹️ Outliers
📏 INTERVAL & RATIO

MEDIAN
💟 Middle value of ranked data 💟
(n+1) /2
☹️ Doesn’t represent distribution
📏 ORDINAL

MODE
💟 Most often 💟
☹️ not sophisticated.
📏 NOMINAL

Question 2

Dispersion
(How much distribution is stretched)

Answer 2

RANGE
💟 Max - Min 💟
☹️ Does represent
📏 ORDINAL

STANDARD DEVIATION
💟 How far from the mean 💟
Always used
☹️Effected by Outliers
📏 INTERVAL/RATIO SAW B

INTERQUARTILE RANGE
Rank scores
LQ n+1/4 UQ 3(n+1)/4
💟 Upper quartile - Lower quartile 💟
📏 ORDINAL