Monthly Rules of Thumb

Home

Year

Month

Rule

Reference

Bio

2004

May

Sample Sizes When the Variance is Estimated.

Rule 2.1

Bio

 

April

Sample Size for Ratios of Means.

New Rule 2.13

Bio

 

March

Scales of Measurement.

Rule 1.13

Book Contents

 

February

Dichotomize Continuous Variables for Odds Ratio Analysis.

New Rule 4.13

Monthly Rule

 

January

Think about SPIN and SNOUT.

New Rule

Errata

2003

December

Don't Summarize Regression Sampling Schemes with Correlation.

Rule 3.2

Links

 

November

Be Eclectic and Ecumenical in Inference.

Rule 8.11

Book List

 

October

Web Resources.

Rule 1.18

Presentations

 

September

Hard and Fast Rule: Always use p=0.05. Not.

New Rule 1.18

Guest Book

 

August

Use At Least Twelve Observations in Constructing a Confidence Interval

Rule 1.10

Contact

 

July

Very non-significant P-values are very significant.

New Rule 1.17

Author

 

June

Correlations need to be substantial to gain advantage in ANCOVA.

New Rule 6.14

Webmaster

 

May

Think beyond simple ANOVA when a factor is time or dose--think ANCOVA. Case B: Factorial ANOVA

New Rule 6.13

 

April

Think beyond simple ANOVA when a factor is time or dose--think ANCOVA. Case A: One-way ANOVA

New Rule 6.13

 

 

March

In Screening, Ruling Out Disease Requires High Sensitivity, Ruling In Disease Requires High Specificity

New Rule 4.13

 

 

February

The Odds Ratio Approximates the Relative Risk Assuming that the Disease is Rare

Rule 4.2

 

 

January

Begin with a Basic Formula for Sample Size

Rule 2.1

 

2002

December

Listen to, and Heed the Advice of Experts in the Field

Rule 8.12

 

 

November

Number of Events per Variable

Rule 4.6

 

 

October

Be Wary of Surrogates and Accept Substitutes Warily

Rule 4.9

 

 

September

Use Text For a Few Numbers, Tables for Many Numbers, Graphs for Complex Relationships

Rule 7.1

 

 

August

Any Basic Statistical Computing Package Will Do

Rule 8.8

 

 

July

Assess Independence, Equal Variance, and Normality---in That Order

Rule 1.4

 

 

June

Multiple Comparisons

Rule 6.12

 

 

May

Distinguish Between Observational and Experimental Studies

Rule 1.1

 

 

Gerald van Belle

May 3, 2004