Denkschrift über die Maschinenindustrie der Welt, bestimmt für das Komitee B des Vorbereitenden Ausschusses der Internationalen Wirtschaftskonferenz des Völkerbundes

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Multivolume work

Identifikator:: 1896933912

Document type:: Multivolume work

Author:: Keith, Arthur Berriedale http://d-nb.info/gnd/119086794

Title:: Responsible government in the Dominions

Place of publication:: Oxford

Publisher:: Clarendon Press

Year of publication:: 1912-

Collection:: Economics Books

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Volume

Identifikator:: 1896934455

URN:: urn:nbn:de:zbw-retromon-236504

Document type:: Volume

Author:: Keith, Arthur Berriedale http://d-nb.info/gnd/119086794

Title:: Responsible government in the Dominions

Volume count:: Vol. 1

Place of publication:: Oxford

Publisher:: Clarendon Pr.

Year of publication:: 1912

Scope:: LI, 568 Seiten

Digitisation:: 2022

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

So THEORY OF STATISTICS. 7. Taking the mean stature for the British Isles as 67°46 in. (the dis- tribution of fig. 49), the mean for Cambridge students as 68:85 in., and the common standard-deviation as 2:56 in., what percentage of Cambridge students exceed the British mean in stature, assuming the distribution normal % 8. As stated in Chap. X1l[., Example ii., certain crosses of Pisum sativum based on 7125 seeds gave 25°32 per cent. of green seeds instead of the theoretical proportion 25 per cent., the standard error being 0°51 per cent. In what per- centage of experiments based on the same number of seeds might an equal or greater percentage be expected to occur owing to fluctuations of sampling alone? 9. In what proportion of similar experiments based on (1) 100 seeds, (2) 1000 seeds, might (a) 30 per cent. or more, (5) 35 per cent. or more, of green seeds, be expected to occur, if ever ? 10. In similar experiments, what number of seeds must be obtained to make the ‘¢ probable error ” of the proportion 1 per cent. ? 11. If skulls are classified as dolichocephalic when the length-breadth index is under 75, mesocephalic when the same index lies between 75 and 80, and brachycephalic when the index is over 80, find approximately (assuming that the distribution is normal) the mean and standard-deviation of a series in which 58 per cent. are stated to be dolichocephalic, 38 per cent. meso- cephalic, and 4 per cent. brachycephalic, 216

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