diff --git a/R/AndradeTb2.16.R b/R/AndradeTb2.16.R
index 347af81b37a89248459699e06db09a99b0fa7009..4d35ed5891b822695b2bd6f326f0776680f07fec 100644
--- a/R/AndradeTb2.16.R
+++ b/R/AndradeTb2.16.R
@@ -14,8 +14,6 @@
 #'     2.16, pág. 96)
 #' @examples
 #'
-#' library(lattice)
-#'
 #' data(AndradeTb2.16)
 #' str(AndradeTb2.16)
 #'
diff --git a/R/AndradeTb2.17.R b/R/AndradeTb2.17.R
index 6b48d3113c28c7f198277d04a58d1fa5fa4eb7b5..f0270340975a4b8c08b4c749034c640fb7de4b97 100644
--- a/R/AndradeTb2.17.R
+++ b/R/AndradeTb2.17.R
@@ -9,8 +9,6 @@
 #'     2.17, pág. 96)
 #' @examples
 #'
-#' library(lattice)
-#'
 #' data(AndradeTb2.17)
 #' str(AndradeTb2.17)
 #'
diff --git a/R/AndradeTb2.18.R b/R/AndradeTb2.18.R
index 6419156b91b8d0f8809bfd3ebbf62304c948951a..e611e1847f6f27f7d7b769a20db8208aff29245c 100644
--- a/R/AndradeTb2.18.R
+++ b/R/AndradeTb2.18.R
@@ -10,8 +10,6 @@
 #'     2.18, pág. 97)
 #' @examples
 #'
-#' library(lattice)
-#'
 #' data(AndradeTb2.18)
 #' str(AndradeTb2.18)
 #'
diff --git a/R/AndradeTb2.20.R b/R/AndradeTb2.20.R
new file mode 100644
index 0000000000000000000000000000000000000000..e29032311185eb29b0104bc5a215431d7bd5f6ee
--- /dev/null
+++ b/R/AndradeTb2.20.R
@@ -0,0 +1,29 @@
+#' @name AndradeTb2.20
+#' @title Altura de Brotos de Explantes de Abacaxi
+#' @description Experimento desenvolvido para avaliar o comportamento
+#'     \emph{In Vitro} de abacaxi (\emph{Ananas comosus}) cv. Primavera
+#'     e referem-se à variável altura dos brotos de explantes, em
+#'     centímetros.
+#' @format Um \code{vetor} numérico com 39 observações.
+#' @keywords AAS
+#' @source Estatística para as ciências agrárias e biológicas: com
+#'     noções de experimentação / Dalton F. Andrade, Paulo J. Ogliari.
+#'     2. ed. rev. e ampl. - Florianópolis: Ed. da UFSC, 2010. (Tabela
+#'     2.20, pág. 102)
+#' @examples
+#'
+#' data(AndradeTb2.20)
+#' str(AndradeTb2.20)
+#'
+#' hist(AndradeTb2.20,
+#'      col = "darkturquoise",
+#'      labels = TRUE,
+#'      main = "",
+#'      prob = TRUE,
+#'      ylim = c(0, 2.5),
+#'      xlab = "Altura dos Brotos (em cm)",
+#'      ylab = "Densidade")
+#'
+#' lines(density(AndradeTb2.20), lwd = 2)
+#'
+NULL
\ No newline at end of file
diff --git a/data-raw/AndradeTb2.20.txt b/data-raw/AndradeTb2.20.txt
new file mode 100644
index 0000000000000000000000000000000000000000..beed62de33fc2e68a4e4f10a7d44b870e9bf3941
--- /dev/null
+++ b/data-raw/AndradeTb2.20.txt
@@ -0,0 +1,39 @@
+1
+1.01
+1.08
+1.11
+1.18
+1.19
+1.19
+1.2
+1.21
+1.25
+1.26
+1.27
+1.27
+1.3
+1.31
+1.34
+1.34
+1.35
+1.36
+1.36
+1.37
+1.37
+1.39
+1.41
+1.43
+1.43
+1.44
+1.46
+1.47
+1.47
+1.49
+1.5
+1.52
+1.57
+1.61
+1.62
+1.68
+1.73
+1.77
diff --git a/data/AndradeTb2.20.rda b/data/AndradeTb2.20.rda
new file mode 100644
index 0000000000000000000000000000000000000000..8550b472ad81646559e56ff1e5229a0d04a74de8
Binary files /dev/null and b/data/AndradeTb2.20.rda differ
diff --git a/man/AndradeTb2.16.Rd b/man/AndradeTb2.16.Rd
index ad248ca243b8226f9fcc8949017c4590281fab65..275324dfd37030133602a43f4039a4da1e9e11a2 100644
--- a/man/AndradeTb2.16.Rd
+++ b/man/AndradeTb2.16.Rd
@@ -20,8 +20,6 @@ Avaliação da formação de calos, mais especificamente, da
 }
 \examples{
 
-library(lattice)
-
 data(AndradeTb2.16)
 str(AndradeTb2.16)
 
diff --git a/man/AndradeTb2.17.Rd b/man/AndradeTb2.17.Rd
index bf94275d40b4164eb3ddd89ba20c6b532bcae661..86793f6e300b16898175a206567287a31628c0f3 100644
--- a/man/AndradeTb2.17.Rd
+++ b/man/AndradeTb2.17.Rd
@@ -15,8 +15,6 @@ Dados de peso da carne de mexilhões de manguezal.
 }
 \examples{
 
-library(lattice)
-
 data(AndradeTb2.17)
 str(AndradeTb2.17)
 
diff --git a/man/AndradeTb2.18.Rd b/man/AndradeTb2.18.Rd
index c57508dbba5db108033c6091f341df69a0a96795..be5759301d1f2f899f23c6bfdc0bf81af2cb5107 100644
--- a/man/AndradeTb2.18.Rd
+++ b/man/AndradeTb2.18.Rd
@@ -16,8 +16,6 @@ Rendimentos médios, em \eqn{kg.ha^{-1}}, de 32 híbridos
 }
 \examples{
 
-library(lattice)
-
 data(AndradeTb2.18)
 str(AndradeTb2.18)
 
diff --git a/man/AndradeTb2.20.Rd b/man/AndradeTb2.20.Rd
new file mode 100644
index 0000000000000000000000000000000000000000..fa54038a15c0662a9c5592d9111a23c75f6d8f8c
--- /dev/null
+++ b/man/AndradeTb2.20.Rd
@@ -0,0 +1,37 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/AndradeTb2.20.R
+\name{AndradeTb2.20}
+\alias{AndradeTb2.20}
+\title{Altura de Brotos de Explantes de Abacaxi}
+\format{Um \code{vetor} numérico com 39 observações.}
+\source{
+Estatística para as ciências agrárias e biológicas: com
+    noções de experimentação / Dalton F. Andrade, Paulo J. Ogliari.
+    2. ed. rev. e ampl. - Florianópolis: Ed. da UFSC, 2010. (Tabela
+    2.20, pág. 102)
+}
+\description{
+Experimento desenvolvido para avaliar o comportamento
+    \emph{In Vitro} de abacaxi (\emph{Ananas comosus}) cv. Primavera
+    e referem-se à variável altura dos brotos de explantes, em
+    centímetros.
+}
+\examples{
+
+data(AndradeTb2.20)
+str(AndradeTb2.20)
+
+hist(AndradeTb2.20,
+     col = "darkturquoise",
+     labels = TRUE,
+     main = "",
+     prob = TRUE,
+     ylim = c(0, 2.5),
+     xlab = "Altura dos Brotos (em cm)",
+     ylab = "Densidade")
+
+lines(density(AndradeTb2.20), lwd = 2)
+
+}
+\keyword{AAS}
+