An Introduction to the theory of statistics

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Monograph

Identifikator:: 1768047243

URN:: urn:nbn:de:zbw-retromon-174903

Document type:: Monograph

Author:: Reibnitz, Kurt von http://d-nb.info/gnd/116394234

Title:: Amerikas internationale Kapitalwanderungen

Place of publication:: Berlin [u.a.]

Publisher:: de Gruyter

Year of publication:: 1926

Scope:: VIII, 123 S.

Digitisation:: 2022

Collection:: Economics Books

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

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: Erster Abschnitt. Die Kapitaleinfuhr bis zum Weltkrieg

Collection:: Economics Books

THEORY OF STATISTICS. EXERCISES. 1. Take the following figures for girls corresponding to those for boys in Example i., p. 45, and discuss them similarly, but not necessarily using exactly the same comparisons, to see whether the conclusion that * the connecting link between defects of body and mental dulness is the coincident defect of brain which may be known by observation of abnormal nerve signs” seems to hold good. A, development defects. 2B, nerve signs. 2), mental dulness N 10,000 (4B) 248 (4) 682 (4D) 307 (B) 850 (BD) 363 (D) 689 (4 BD) 128 9. (Material from Census of England and Wales, 1891, vol, iii.) The following figures give the numbers of those suffering from single or combined infirmities : (1) for all males, (2) for males of 55 years of age and over. 4, Blindness. B, Mental derangement. €, Deaf-mutism. (1) (2) (1) (2) All Males. Males 55- All Males. Males 55- N 14,053,000 1,377,000 (4B) 183 65 (4) 12,281 5,538 (40) 51 14 (B) 45,392 10,309 (BC) - 299 47 (0) 7,707 746 (4BC) 11 3 Tabulate proportions per thousand, exhibiting the total association between blindness and mental derangement, and the partial association between the same two infirmities among deaf-mutes, (1) for males in general, (2) for those of 55 years of age or over. Give a short verbal statement of the results, and contrast them with those of Question 1. 3. (Material from supplement to 55th Annual Report Reg.-Genl.) The death-rate from cancer for occupied males in general (over 15) is 0°685 per thousand per annum, and for farmers 120. The death-rates from cancer for occupied males under and over 45 respec- tively are 0°13 and 2°25 respectively. Of the farmers 46-1 per cent. are over 45. Would you say that farmers were peculiarly liable to cancer? 4. A population of males over 15 years of age consists of 7 per cent. over 65 years of age and 93 per cent. under. The death-rates are 12 per thousand per annum in the younger class and 110 in the older, or 18-86 in the whole population. The death-rate of males (over 15) engaged in a certain industry is 267 per thousand. If the industry be not unhealthy, what must be the approximate proportion of those over 65 engaged in it (neglecting minor differences of age distribution) 5. Show that if 4 and B are independent, while 4 and C, B and C are associated, 4 and B must be disassociated either in the universe of C's, the universe of v's, or both. 6. As an illustration of Question 5, show that if the following were actual data, there would be a slight disassociation between the eye-colours of husband and wife (father and mother) for the parents either of light-eyed sons or not-light-eyed sons, or both, although there is a slight positive association for parents at large. 58

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