Cronbach’s Alpha is a way to measure the internal consistency of a survey or questionnaire.…
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Statistics Tools
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CalculatorsRegression CalculatorStatistics Tools
Coefficient of Determination Calculator
by Erma Khanby Erma KhanThe coefficient of determination, often denoted R2, is the proportion of variance in the response…
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CalculatorsStatistics ToolsSummary Statistics Calculator
Covariance Matrix Calculator
by Erma Khanby Erma KhanThis calculator creates a covariance matrix for up to five different variables. Simply enter the…
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CalculatorsStatistics ToolsSummary Statistics Calculator
Correlation Matrix Calculator
by Erma Khanby Erma KhanThis calculator creates a correlation matrix for up to five different variables. Simply enter the…
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CalculatorsSample Size CalculatorStatistics Tools
Sample Size Calculator for a Mean
by Erma Khanby Erma KhanThe sample size required to estimate a population mean with a certain level of confidence…
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CalculatorsCritical Value Finder CalculatorStatistics Tools
Percentile to Z-Score Calculator
by Erma Khanby Erma KhanThis calculator finds the z-score associated with a given percentile. Simply enter a percentile in…
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CalculatorsSample Size CalculatorStatistics Tools
Sample Size Calculator for a Proportion
by Erma Khanby Erma KhanThe sample size required to estimate a population proportion with a certain level of confidence…
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CalculatorsSample Size CalculatorStatistics Tools
Sturges’ Rule Calculator
by Erma Khanby Erma KhanSturges’ Rule uses the following formula to determine the optimal number of bins to use…
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CalculatorsStatistics ToolsTime Series Calculator
Mean Absolute Error Calculator
by Erma Khanby Erma KhanIn statistics, the mean absolute error (MAE) is a way to measure the accuracy of…
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CalculatorsDistributions CalculatorStatistics Tools
Uniform Distribution Calculator
by Erma Khanby Erma KhanThe uniform distribution is a probability distribution in which every value between an interval from…