Data Processing Techniques Flashcards
What is Spearman’s Rank Correlation, and why is it used?
A statistical test measuring the strength and direction of correlation between two variables.
What is the purpose of a Chi-Square test in geography?
Compares observed and expected values to determine if patterns are statistically significant.
What does a high standard deviation indicate about a dataset?
A high standard deviation means data points are widely spread, indicating more variability.
What is GIS, and how is it used in data processing?
GIS (Geographic Information Systems) is used to store, analyze, and visualize spatial data by layering different datasets on a digital map.
Name three common ways to visually present geographical data.
Choropleth maps – Use colors to show data variation.
Scatter graphs – Show relationships between two variables.
Flow maps – Represent movement (e.g., migration).
What is interpolation, and why is it useful in geographical data analysis?
A method for estimating unknown values between data points, useful for climate mapping.
What is meant by data normalisation, and why is it important?
Adjusting data to a common scale (e.g., per 1,000 people) for fair comparison.
How can standard deviation be used in geographical analysis?
Measures data spread from the mean, helping assess variability in datasets.
What is the difference between mean, median, and mode?
Mean: The average of all values.
Median: The middle value in an ordered dataset.
Mode: The most frequently occurring value.
What are the advantages of using GIS for data processing?
Enables spatial analysis, real-time mapping, and layering of multiple datasets for deeper insight.
