This paper briefly reviews the Wilcoxon signed rank sum test and proposes a modification. Unlike the Wilcoxon method, the proposed approach does not require that the populations being studied be continuous. Also unlike the Wilcoxon signed rank test the proposed method, does not require the absence of zero differences or tied absolute values of differences. Rather the proposed method structurally makes provisions for these possibilities. The proposed test statistic also enables the estimation of the probabilities of positive, zero or tied and negative differences within the data. This was illustrated with an example and the proposed method was generally more efficient and hence more powerful than the Wilcoxon test statistic with the power increasing as the number of tied observations or zero differences increases
This study examines the relationship between the number of living sons and contraceptive use among married female teachers in primary and secondary schools of the Enugu urban area, Anambra State, Nigeria. Within each category of number of living children, women with no living sons were least likely to have ever used modern contraceptives. Contraceptive use increased directly with number of living sons. However, women with only sons and no daughters were less likely to have ever used modern contraceptives than were women with at least one son and one daughter. Better educated women who were close to achieving their desired family size, or whose desired family sex ratio was relatively low, were more likely to be contraceptive users.
This study examines the level of knowledge, attitude, and practice of family planning among postsecondary female students in an urban area of Anambra State, Nigeria. Although only a few of the women sampled expressed knowledge of modern contraceptive methods, the majority had favorable attitudes toward family planning. Among those who had knowledge of family planning, those who had attended a coeducational secondary school were more familiar with modern contraceptive methods, and those who had attended an all-girls' secondary school were more familiar with the rhythm method. Of the 23.3 percent who had ever practiced family planning, almost half had used rhythm; only a very small minority had ever used the pill. Among those who had ever used contraception and who had a positive attitude toward family planning, the greatest proportion was made up of older, married Protestant women.
Introduction: Birth weight is an important determinant of infant morbidity and mortality. Its effect extends upto adult life and may explain some non-communicable diseases that may occur in adult life. In general, males weigh more than females. Birth weight is categorised into three levels, viz., low, normal and high. This study analysed the relationship between gender and the categories of birth weights. Materials and Methods: Data on babies’ gender and birth weights from 961 term life deliveries in a private general practice hospital were analysed. Test on equality of the mean weight of males and females at the three categorical levels were done using z test and t-tests, as necessary. Results: Mean birth weight was found to be 3.30 ± 0.495 kg. Males weighed significantly heavier than females at mean weights of 3.343 ± 0.495 kg and 3.258 ± 0.490 kg, respectively. In the low birth weight category, males weighed 1.844 ± 0.297 kg and females weighed 1.992 ± 0.397 kg. There was no significant difference. Similarly, the mean weight of males and females in the high birth weight category were 4.462 ± 0.343 kg and 4.342 ± 0.219 kg, respectively with no significant difference. In the normal weight category, males weighed significantly more than the females with the mean weight of 3.30 ± 0.359 kg and 3.248 ± 0.392 kg, respectively. Conclusion: Male babies weighed more than female babies only in the normal birth weight category. The factor that selectively affected the birth weight of male babies must be acting under the category of normal birth weight only. More studies are necessary to identify the factors and the reasons, for which they act only at the level of the normal birth weight.
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