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 nonsignificant Pvalues 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 dosethink ANCOVA. Case B: Factorial ANOVA

New Rule 6.13



April

Think beyond simple ANOVA when a factor is
time or dosethink ANCOVA. Case A: Oneway 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
Normalityin 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
