Milk dataset

Fat Content of Human Milk by Two Methods.

Fat content of human milk determined by enzymic procedure for the determination of triglycerides and measured by the standard Gerber method (g/100 ml). data

Milk

Format

A data frame with 45 observations on the following 2 variables.

• Gerber: Fat content measured by the standard gerber method (g/100 ml).
• Trig: Fat content measured by determination of triglycerides (g/100 ml).

Details

Fat content of human milk determined by enzymic procedure for the determination of triglycerides (standard Gerber method) and determined by the measurement of glycerol released by enzymic hydrolysis of triglycerides.

References

Bland, J.M. and Altman, D.G., 1999. Measuring agreement in method comparison studies. Statistical methods in medical research, 8(2), pp.135-160.

Examples

data(Milk, package = "R4HCR")

d <- with(Milk, Trig - Gerber)
a <- with(Milk, (Trig + Gerber)/2)

# regression approach for nonuniform differences
M <- lm(d ~ a)

# as per Bland and Altman (1999) page 147.
coef(M)