. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 1935 1936 1937 1938 1939 1940 1941 1942 YEAR HATCHED 20 I 5 I 0 CHART 2 MORTALITY RATES 8 WEEKS TO 6 MONTHS SEXES COMBINED. 1935 1936 1937 1938 1939 YEAR HATCHED 942 Two points are of vital interest in the consideration of the data: First, has there been a progressive increase or decrease in mortality rate during the eight- year period? Second, was there a significant difference in the mortality rates in the four lines? The data (Table IB and Chart 2) show a consistently higher mortality rate in males tha
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. 1935 1936 1937 1938 1939 1940 1941 1942 YEAR HATCHED 20 I 5 I 0 CHART 2 MORTALITY RATES 8 WEEKS TO 6 MONTHS SEXES COMBINED. 1935 1936 1937 1938 1939 YEAR HATCHED 942 Two points are of vital interest in the consideration of the data: First, has there been a progressive increase or decrease in mortality rate during the eight- year period? Second, was there a significant difference in the mortality rates in the four lines? The data (Table IB and Chart 2) show a consistently higher mortality rate in males than in females during the period from 8 weeks to 6 months of age. This is in agreement with the observ^ations of a number of workers. The mean mortality rates for all chicks in each of the four lines over the eight- year period were fitted to a straight line by the method of least squares and the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
Size: 2187px × 1143px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthormassachusettsagricult, bookcentury1900, bookdecade1900
