E political and infrastructure factors
<span>The ancient Egyptians had the ability to grow everything they needed to eat. Although Egypt is a desert, the Egyptians settled near the Nile River. Every year the Nile floods for three months, bringing rich soil and silt that fertilizes the land. Egyptians developed a well-designed system of canals to bring the water from the Nile into other areas and using farming techniques, they grew a wide variety of foods. </span>
False. <span>Attrition is only an issue in the successive independent samples design and longitudinal designs. Attrition refers to samples decreasing over time and how they are less likely to be a good representation of the population that the sample was drawn from. Because of attrition, there are issues within the samples taken to survey these designs. However, there are issues still that relate to both that don't with attrition. </span>