Free Data Cleaning, Coding and Screening Tools
Get raw survey and spreadsheet data ready for analysis: define variables and value labels, fix common data problems automatically, recode and compute scale scores, test whether missing data are missing completely at random, and screen for univariate and multivariate outliers.
Data Cleaning and Coding Tool
Variable view, value labels, recoding, reverse-coding, compute, missing values, duplicates and outliers, with a health check and SPSS-ready export.
Replaces SPSS · OpenRefineLittle’s MCAR Test and Missing Data Analysis
Missing values per variable, missing-data patterns, Little’s MCAR test and EM estimates of means and correlations.
Replaces SPSS Missing ValuesOutlier Calculator (Z-Score, IQR, Grubbs and Mahalanobis)
Find univariate outliers with z-scores, Tukey’s IQR fences and Grubbs’ test, and multivariate outliers with Mahalanobis distance.
Replaces SPSS · PrismData Cleaning and Coding Tool
Use it before any analysis of survey, experiment or spreadsheet data: after downloading responses from Qualtrics, Google Forms, SurveyMonkey or Excel, and before running reliability, factor analysis, regression or SEM.
Little’s MCAR Test and Missing Data Analysis
Use it before any analysis of data with gaps, to report how much is missing, to see whether some variables or respondents are missing more often, and to justify the missing-data method you choose.
Outlier Calculator (Z-Score, IQR, Grubbs and Mahalanobis)
Use it during data screening, before t-tests, ANOVA, regression, factor analysis or SEM, because a few extreme values can change means, correlations and coefficients.
Other categories
Describe and explore · Compare means · Nonparametric tests · Correlation and regression · Bayesian statistics · Categorical data · Reliability and agreement · Multivariate analysis · Structural equation modeling · Econometrics and time series · Panel data and causal inference · Marketing and decision research · Survival, clinical and meta-analysis · Study planning and calculators · PLS-SEM