The frets data frame has 25 rows and 4 columns.
frets数据框有25行和第4列。
The data consist of measurements of the length and breadth of the heads of pairs of adult brothers in 25 randomly sampled families. All measurements are expressed in millimetres.
包括在随机抽取的25家庭对成年的兄弟元首的长度和宽度的测量数据。所有测量都以毫米为单位表示。
用法----------Usage----------
frets
格式----------Format----------
This data frame contains the following columns:
这个数据框包含下列资料:
The head length of the eldest son.
头长的长子。
The head breadth of the eldest son.
头宽的长子。
The head length of the second son.
头长的第二个儿子。
The head breadth of the second son.
第二个儿子的头广度。
源----------Source----------
The data were obtained from
数据取自
Frets, G.P. (1921) Heredity of head form in man. Genetica, 3, 193.
音品,G.P. (1921年)的遗传形式在人的头部。遗传学,3,193。
参考文献----------References----------
Bootstrap Methods and Their Application. Cambridge University Press.
John Wiley.
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。