Answer:Research design is needed because it facilitates the smooth sailing of the various research operations, thereby making research as efficient as possible yielding maximal information with minimal expenditure of effort, time and money. Research design has a significant impact on the reliability of the results obtained
Explanation: there you go hopes that help
Its is to end slavery because of troubles
Do you mean how many live there now?
<span>A knowing relinquishment of a legal right is called a waiver and, in the legal world, is usually completed by signing a legal document.</span>
The factors, exposures, characteristics, and behaviors that determine patterns of disease are described using Determinants.
