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Interviews
Detailed insights via face-to-face or telephone methods.
Questionnaires
Cost-effective surveys that may yield low responses.
Experimental Method
Controlled studies establishing cause-and-effect relationships.
Observational Study
Records real-time events, minimizing bias in data.
Data Organization
Classifying and structuring data for usability.
Graphs
Visual representations illustrating data relationships.
Charts
Structured displays of data in various formats.
Tables
Organized data in rows and columns for clarity.
Pictures
Visual representations used to convey data meaning.
Bar Graph
Visualizes independent values for comparison.
Line Graph
Shows trends and changes over time.
Cartesian Graph
Uses axes to illustrate numerical relationships.
Statistics
Design, collection, and interpretation of data.
Descriptive Statistics
Summarizes data using graphs and measures.
Inferential Statistics
Predicts population characteristics from sample data.
Mean
Average value of a dataset.
Median
Middle value in ordered data.
Mode
Most frequently occurring value in data.
Range
Difference between highest and lowest values.
Mean Deviation
Average of absolute differences from the mean.
Variance
Mean of squared deviations from the mean.
Standard Deviation
Average distance of data points from the mean.
Sample Standard Deviation
Uses n-1 for accurate population variability estimation.