Africa, Portugal. Portuguese trading stations in West Africa and the slave trade. Portuguese expansion into Africa began with the desire of King John I to gain access to the gold-producing areas of West Africa.ortuguese trading stations in East Africa and the Slave trade. A map drawn in Spain dated 1375, showing the king of Mali holding a gold nugget. Source: British Library. Well-established gold and ivory trade network existed between African kingdoms in the interior and cities on the east coast of Africa.
Statistical analysis is used in quantitative research to collect, organize, and describe empirical data. All quantitative studies rely on statistical analyses because quantitative research is a method of approaching questions that is based on concrete, observable, objective, and measurable data.
Analyzing the Data. In correlational research, data analysis involves computing an index of the degree of relationship between variables under study. The type of correlation coefficient computed depends on the level of measurement used for both of the variables.