Security Administration Vii 2 Statistical Analysis
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Transcript of Security Administration Vii 2 Statistical Analysis
Statistical Analysis
Overview• Collecting Data
• Organizing Data
• Analyzing Data
• Correlations and Causality
• Review
Statistical Analysis• Collecting
• Organizing
• Analyzing
DATA
• Sense, Spot & Deal with Problems–Special Functions
–Employee Turnover
• Work with Multiple Influences
• Take Calculated Risks
Collecting Data
Organizing Data• Simplify Affinity Diagrams
– Organize diverse data
– Engage many people
– Surface differing perspectives
– Promote common understanding
Affinity Diagrams
Analyzing Data
• Decision making
• Probability theory
–Mutually exclusive
–Collectively exhaustive
• Forecasting
Monty Hall problem
Monty Hall Problem 2
Correlations and Causality• Variable
–Independent–Dependent
• Correlation–Relationship between two
variables
• Causality
Causality
• Must be correlation
• Cause before effect
• Relationship not due to 3d variable (spurious)
• Test with experimental design
Causation?
ReviewWhy should security supervisors
understand statistics?
When should affinity diagrams be used?
Distinguish mutually exclusive from collectively exhaustive
How do you prove causality?
That’s all . . .