Geography 2210A/B Lecture Notes - Lecture 9: Data Visualization, Histogram, Kurtosis
14 Dec 2017
School
Department
Course
Professor
Document Summary
Purposive sampling: researcher selects units based on knowledge and experience, useful when very little is known about study population. Progressively select units base on information provided from previously sampled units. Can identify units in a poorly known study population. Purposely selects individuals based on who you have selected before. Sampling someone and then asking who they think i should sample that has similar knowledge. The direction you head is based on who you sampled before: definitley not independent, mixed sampling designs, characteristics of both random and non-random designs, systematic sampling, divide study population into intervals of equal size randomly select. Number in first interval and then use this number in each remaining interval. Even modest-sized data sets are hard to quickly and efficiently distill information from. Solution = data visualization: table or plot/graph, may be end of data analysis or beginning.
