Quantitative Analysis

Sample Sizes:

  • F (n = 53)
    • AHY-F (n = 21)
    • HY-F (n = 32)
  • M (n = 55)
    • AHY-M (n = 26)
    • HY-M (n = 29)

Measurements in relation to sex

Closer look at these scatter plots here

Measurements in relation to how accurately bird was sexed

Closer look at these scatter plots here

Notes on Correlation ("Cor.") values

  • Exactly –1. A perfect downhill (negative) linear relationship
  • –0.70. A strong downhill (negative) linear relationship
  • –0.50. A moderate downhill (negative) relationship
  • –0.30. A weak downhill (negative) linear relationship
  • 0. No linear relationship
  • +0.30. A weak uphill (positive) linear relationship
  • +0.50. A moderate uphill (positive) relationship
  • +0.70. A strong uphill (positive) linear relationship
  • Exactly +1. A perfect uphill (positive) linear relationship

Histograms

Culmen Histogram

Toe Histogram

Culmen + Toe + Tarsus Histogram

Culmen + Toe Histogram