Web pointer 14.1  Statistical selection software

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URL in book

Last Updated

There is a number of useful computer based programs that assist in the selection of the appropriate form of statistical analysis.  You are prompted with simple questions.  When you have answered each question your are advised of a likely method.  Four useful such programs are

Statistics coach

Part of SPSS.  Click the Help button in SPSS to access the Coach

Statistical Advisor

http://www.statsoft.com/
textbook/advisor.html

Selecting statistics

http://trochim.human.cornell.edu/
selstat/ssstart.htm

Knodt’s Help with Statistical analysis

http://members.aol.com/statware/
pubpage.htm#A2SSYY

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Web pointer 14.2  Online calculators for bivariate statistics and further discussion of bivariate statistics

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URL in book

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A variety of calculators for calculating Chi-square and related statistics (gamma, Kendall’s tau, Somers d etc) from crosstabulation input

http://members.aol.com/
johnp71/javastat.html#CrossTabs

Online chi-square calculators

http://www.stat.sc.edu/
webstat/version2.0/

http://www.physics.csbsju.edu/
stats/contingency.html

http://davidmlane.com/
hyperstat/chi_square.html

http://ebook.stat.ucla.edu/
~jbond/TABLES/

Explains and calculates Spearman’s correlation

http://nimitz.mcs.kent.edu/
~blewis/stat/scon.html

Modstat: Calculates a wide range of statistics or in downloadable evaluation software

A good discussion of crosstabulation analysis, bivariate graphs and correlation coefficients.  Beware: this discussion places the independent variable on the side rather than the top of the table and incorrectly asserts that crosstabulations are only for nominal variables

http://www.statsoftinc.com/
textbook/stbasic.html
#Crosstabulation

Go to the section on Crosstabulations & stub-and-banner tables

Nominal measures of association: A first rate and accessible discussion of a wide range of statistics used to detect correlation between nominal variables

http://www2.chass.ncsu.edu/
garson/pa765/assocnominal.htm

First rate discussion of ordinal measures of association:

http://www2.chass.ncsu.edu/garson/
pa765/assocordinal.htm

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Web pointer 14.3  Bivariate inferential analysis  

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URL in book

Last Updated

A good brief discussion of significance levels

http://www.statsoftinc.com/textbook/
esc.html#What is "statistical significance" (p-level)

Clear discussion of the logic of hypothesis testing and significance levels.

http://davidmlane.com/
hyperstat/logic_hypothesis.html

Good discussion of relationship between sample size, strength of correlations and statistical significance.

http://www.statsoftinc.com/textbook/
esc.html#Why stronger relations 
between variables are more 

An explanation of why only large samples will produce weak relationships that are statistically significant.

http://www.statsoftinc.com
/textbook/esc.html#Why small relations can
 be proven significant only in large

A very good discussion of confidence intervals, sample size, significance levels and confidence intervals.

http://www.sportsci.org/
resource/stats/generalize.
html#effect

Calculators for confidence intervals of some ordinal measures of association (but only for very limited range of table sizes)

Download the program SISA tables from the following web site: 

http://home.clara.net/sisa/
pasprog.htm#SPRT  .  

This program can calculate statistics for 2 x 2,  2 x 7 and 3 x 3 tables.  It calculates confidence intervals for Kendall’s tau, gamma and lambda.  Alternatively the site

http://home.clara.net/
sisa/index.htm  

enables the same online analysis but is

 restricted to 2 x 2 and 2 x 5 tables

A calculator for confidence interval for a Pearson’s or Spearman’s correlation

http://glass.ed.asu.edu/
stats/analysis/rci.html

A spreadsheet calculator for (among other things) calculating confidence limits for Pearson’s r and other normally distributed statistics

http://www.sportsci.org/
resource/stats/xcl.xls

A series of quotes from statisticians who object to the slavish (and often inappropriate) use of significance tests – especially when used on their own.

http://www.indiana.edu/
~stigtsts/quotsagn.html

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