Accuracy assessment methods and current challenges

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Note: 1. Equations may be re-written e.g. z β = P 2 − P1 n − − zα / 2 2 P2 − P1 PQ 1 1 2 + P Q 2 2 PQ 2. Can also use alternatives for related samples (e.g. McNemar test). 3. Instead of hypothesis testing could use confidence intervals.
So what Remember, important to use appropriate size Too large – any non-zero difference will appear statistically significant. Too small – fail to detect an important difference. Sizes used in remote sensing…. - range from 10s…100s…1000s…10,000+
Page 1 and 2: Accuracy assessment methods and cha
Page 3 and 4: Challenges include • Class defini
Page 5 and 6: Popular measures e.g. Sensitivity =
Page 7 and 8: NO, because the matrix might look l
Page 9 and 10: Impact on estimation Real accuracy
Page 11 and 12: PART 2: Comparisons Often compare (
Page 13 and 14: BUT Aim is often not to estimate ac
Page 15 and 16: Comparative analysis Comparative an
Page 17 and 18: Type II error H o is incorrectly ac
Page 19 and 20: Estimating sample size To determine
Page 21: e.g. common scenario v another accu
Page 25 and 26: v another accuracy

Accuracy assessment methods and current challenges

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