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**21 Statistical Concepts Explained in Simple English**

- Content Validity (Logical or Rational Validity)
- Contingency Coefficient: Definition
- Continuous Probability Distribution
- Continuous Variable Definition (Continuous Data)
- Contour Plots: Definition, Examples
- Control Group: Definition, Examples and Types
- Control Variable: Simple Definition
- Convenience Sampling (Accidental Sampling): Definition, Examples
- Convergent Validity and Discriminant Validity: Definition, Examples
- Cook’s Distance / Cook’s D: Definition, Interpretation
- Correlation Matrix: Definition
- Counterbalancing in Research
- Covariance in Statistics: What is it? Example
- Covariate Definition in Statistics
- Cramer-Rao Lower Bound
- Criterion Validity: Definition, Types of Validity
- Criterion Variable: Definition, Use and Examples
- Critical Z Value TI 83: Easy Steps for the InvNorm Function
- Cronbach’s Alpha: Simple Definition, Use and Interpretation
- C-Statistic: Definition, Examples, Weighting and Significance
- Cumulative Distribution Function CDF

Previous editions can be accessed here: Part 1 | Part 2 | Part 3. Also, if you downloaded our book *Applied Stochastic Processes*, there is an error page 64, that I fixed. The new version of the book can be found here.

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