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#Cruncher

#Cruncher
  • #: 18076
  • Price: $2.99 In Apple Store
  • Category: Productivity
  • Updated: 2011-02-22
  • Current Version: 1.1
  • 1.1 (iOS 4.0 Tested)
  • Size: 0.80 MB
  • Language: English
  • Seller: John Steele
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.2 or later
  • © 2011 John P. Steele, Ph.D.
  •  Add to Favorite apps

 

Description

#Cruncher allows any user to conduct simple and advanced statistics without an internet connection!

I developed this app as a PhD researcher for researchers, students, teachers, and professionals to get more out of everyday data and statistical analyses. I personally use this app when helping students, consulting for organizations, reviewing manuscripts, and analyzing my own data. Most of these calculations are not part of SAS, SPSS, SYSTAT, or LISREL.

The following are just SOME of the many research questions that this app can answer EXTREMELY QUICKLY:

Was the % change significant?

What's the confidence interval for a correlation?

What would a correlation be if the reliability were different?

What would I actually predict a value to be based on regression?

How can I explain a correlation effect to a non-technical audience?

Is mediation occurring?

Are my CFA factors reliable and construct valid?

Does a revised model provide significantly better fit?

How long would it take to transfer a large file at 12kb/s?

This app is UNIQUE because:

it was written by a PhD researcher;

it is INTERACTIVE allowing you to estimate DOZENS of SCENARIOS in SECONDS;

it provides INFORMATION on a separate screen to EXPLAIN each analysis;

analyses and answers can be E-MAILED directly without ever leaving the app!

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Calculators actually included (and growing with future updates!):

Proportion (%) Error and confidence interval

Sample size required to obtain a certain sampling error

Percentage difference significance

Mean Error Confidence Interval

Correlation Significance

Correlation Confidence Interval

Disattenuating Correlations for unreliability

Spearman-Brown Prophecy to estimate reliability

Binomial effect size display (BESD) and Cohen's D

Family-wise error rate calculation

Regression equation to predict the actual criterion score or value

Statistical mediation (Sobel and Aroian)

Basic probability including factorials, permutations, and combinations

Bayesian inference including posterior probability, odds and likelihood ratios

Chi-square raw data analysis of contingency tables with significance and phi-coefficient

Contingency tables include 2X2, 2X3, 3X2, and 3X3

Chi-square difference tests

Structural equation modeling composite reliability

Structural equation modeling construct validity

Structural equation modeling fit indices and comparisons

Fit indices include chi-square/df, RMSEA, CFI, and TLI

Computer unit and time conversions

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*Chi-square and structural equation modeling calculators are only available on iOS versions of 4.1 and greater.

App displays perfectly on iPad

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The information may be outdated (2011-03-27 21:21:16). For actual information go to iTunes

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