validity is whether the results are valid so the data has no mistakes of as such in it whereas reliability is the dependability; when the results you have are accurate and are of enough quality.
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* Probability * Correlation * Validity * Reliability * Variable * Frequency distribution
The difference between internal and external validity is in their nature. Internal validity indicates if a study depicts relation between two variables. External validity on the other hand generalizes the study of the variables.
urmmm .. shows cause and effecthas high control which lead to high reliability & validity
differences between errors and frauds
Differences between Classification and Tabulation