Learning objectives pt. 1 Flashcards
What is statistics? formal definition
science of learning from data, and of measuring, controlling, and communicating uncertainty
what is statistics? less formal definition
about turning facts into meaning and knowledge
What is spatial statistics? 3 facts
- describing/communicating lots of spatial data
- are patterns systematic or random
- describing spatial patterns
3 reasons to learn/apply statistics
- describe patterns/clustering and if they’re random
- describe a population from a sample
- to estimate values through interpolation
Moran’s I brief background
measures global spatial autocorrelation
measures clustering/dispersion across the study area
Range of values for Moran’s I
-1 and 1 (negative = stronger negative spatial AC, positive = stronger positive spatial AC)
0 = random/no spatial AC
Moran’s I stated purpose
compares observed value of a cell to the average values of its neighborhood while excluding itself
Parameter inputs for Moran’s I
General G when would you use it
to identify cold/hot spots for data (high values or low values are clustered)
General G input parameters
General G output
p value < 0.05 reject null hypothesis that there complete spatial randomness
z score = high values for attributes are clustered
z score = low values for attributes are clustered
Which hotspot/cluster test can yield a map including outliers?
Anselin Local Moran’s I
Does GWR release the assumption of stationarity?
Yes
how can you check the suitability of a linear regression model?
check there are no consistent patterns in the residuals
why do we care about spatial autocorrelation?
