Template:LandacreAmstutz1929 table3

From Embryology
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Table III - Showing Means and Variation for Each Rat Age
Maximum Variation
Age
Days-Hrs.
Number of
Litters
Number of
Embryos
Counted
Means All Embryos One Litter Standard
Deviation
Coefficient of
Variation %
10-12 1 4 8.7 6-11 6-11 2.8 32
10-13 1 6 1 0. 2 8-13 8-13 1.9 19
10-16 2 12 12.4 6-26 6-26 5.8 47
10-17 6 48 12.9 4-26 7-26 3 .3 26
10-18 4 23 14.1 6-18 9-18 3.1 22
10-19 1 6 14 .3 12-17 12-17 1.2 8
10-22 3 16 13.1 6-19 6-14 3.9 30
10-23 3 17 15.2 8-18 8-18 2.4 16
11-00 2 0 14.6 10-17 10-17 1.9 13
11-02 2 15 20 . 9 17-22 17-22 1. 3 6
11-04 1 10 25. 3 23-26 23-26 1.2 5
11-06 1 2 18.0 18-18 18-18 .0 0
11-08 1 8 25 0 23-28 23-28 1.9 8
11-09 1 3 22 .0 20-25 20-25 2 . 2 10
11-10 2 18 26.2 21-31 21-31 2.9 11
11-11 3 26 25.6 14-29 14-27 3.2 12
11-12 1 3 26. 7 25-28 25-28 1.2 4
11-14 1 3 21.3 21-22 21-22 .6 2
11-15 1 8 23.1 17-28 17-28 4 . 0 17
11-16 1 7 26.7 24-28 24-28 1.3 5
11-17 1 7 26.1 25-28 25-28 1.1 4
11-18 3 25 25 .4 19-28 19-28 1.9 7
11-20 2 16 27.2 25-29 25-29 1.2 4
23 Ages 44 292 Av 2.2 Av 13%
Data Reference[1]   Links: rat | somitogenesis
  1. Landacre FL. and Amstutz MM. Data on the number of somites compared with age in the white rat. (1929) Ohio J. Science. 29(6): 253-259.