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Table 3 Smoothing and transformation of surveys showing departure from a normal distribution (n = 533)

From: Is Middle-Upper Arm Circumference “normally” distributed? Secondary data analysis of 852 nutrition surveys

Type of transformation or smoothing technique applied to “non-normal” distributions (n = 533) N (%) “normal” distributions
Smoothing Spline 301 (56.5)
Loess 318 (59.7)
Box-Cox transformation Power transformations 304 (57.0)
Smoothing and Box-Cox transformation Box-Cox after Spline 439 (82.4)
Box-Cox after Loess 441 (82.7)