DEFINITION of 'Scheffe's Test'
A statistical test that is used to make unplanned comparisons, rather than preplanned comparisons, among group means in an analysis of variance (ANOVA) experiment. While Scheffe's test has the advantage of giving the experimenter the flexibility to test any comparisons that appear interesting, the drawback of this flexibility is that the test has very low statistical power.
Next Up
BREAKING DOWN 'Scheffe's Test'
While preplanned comparisons can be made using tests such as ttests or Ftests, these tests are not suitable for post hoc or unplanned comparisons. For such comparisons, multiple comparison tests such as Scheffe's test, the TukeyKramer method, or the Bonferroni test are appropriate. The Scheffe test is named after American statistician Henry Scheffe.
RELATED TERMS

Bonferroni Test
A type of multiple comparison test used in statistical analysis. ... 
Analysis Of Variance  ANOVA
A statistical analysis tool that separates the total variability ... 
Balanced ANOVA
A statistical test used to determine whether or not different ... 
TwoWay ANOVA
A statistical test used to determine the effect of two nominal ... 
ThreeWay ANOVA
A statistical test used to determine the effect of three nominal ... 
Analysis Of Variances  ANOVA
An analysis of the variation between all of the variables used ...
Related Articles

Trading
What's a TTest?
TTest is a term from statistics that allows for the comparison of two data populations and their means. The test is used to see if the two sets of data are significantly different from one another. ... 
Financial Advisor
How Advisors Can Hire Successfully and Smartly
The hiring process can be fraught with ups and downs for financial advisor firms. Here are some tools they can use to help find the right candidate. 
Investing
Jump Start Your Financial Career With The BAT
The BAT is quickly becoming known in the job market as a tool to provide a window into the minds of those seeking financial jobs. 
Markets
U.S. Banks Pass First Part of Annual Fed Stress Test (JPM, C)
The 33 U.S. banks tested to ensure they have enough capital to weather a severe economic downturn all passed. 
Markets
Which Economy Is Larger  The United States or China?
China's economy may be larger than the U.S. economy, but it all depends on which exchange rate method you use to make the GDP comparisons. 
Trading
Understanding Statistics
Statistics provide the means to analyze data and then summarize it into a numerical form. 
Trading
How To Start Trading: Live Trading Performance
If live trading results differ from testing, changes to the plan may be needed. Common problems include: trader error, fills and slippage, technical problems and unique trading conditions such ... 
Markets
Explaining Variance
Variance is a measurement of the spread between numbers in a data set. 
Trading
Peer Comparison Uncovers Undervalued Stocks
Learn how to put one of the top equity analysis tools to work for you. 
Managing Wealth
An Investor's Guide To Bank StressTesting
Just how are bank stress tests performed and what is the logic behind them? And is a stress test useful for evaluating a bank's stock?
RELATED FAQS

Do financial advisors get drug tested?
Learn how financial advisor regulatory bodies do not require drug testing but many individual firms that hire advisors do ... Read Answer >> 
What is usability testing, and why is it so important in the Internet sector
Learn why a company would want to conduct a usability test and what types of data and information become available with this ... Read Answer >> 
What assumptions are made when conducting a ttest?
Learn what a ttest is, and discover the five standard assumptions that are made regarding the validity of sampling and data ... Read Answer >> 
How is an unfavorable variance discovered?
Learn how unfavorable variance is discovered through defining budget numbers, such as standard rates for labor and materials, ... Read Answer >> 
Can your insurance company drug test you?
Learn why drug companies conduct drug tests and how a lifestyle free of drugs and alcohol can save you big money on health ... Read Answer >> 
What is the difference between variance and standard deviation?
Explore the differences between standard deviation and variance. Learn more about how statisticians use these two concepts. Read Answer >>