STA 2000 Study Guide - Midterm Guide: Simple Random Sample, Quota Sampling, Barcode
Document Summary
Field of study which deals with collecting and representing data and using data from a. What is statistics? sample to draw conclusions about a population. *for a good representative sample, then the sample statistics should be good estimates of the population* Sample- subgroup of population (representative of entire population) Data- any type of information (quantitative and qualitative) Quantitative: continuous- can be measured precisely over range of values. Qualitative: discreet - takes only specific values ordinal - has inherent order. Identifier data- values used to identify each individual (social security, barcode, license. Indicator data- coded values used to indicate the presence/absence of a trait (when labeling a company, using 0 if non-profit or 1 if for profit, seasons: 1 if spring, 2 if summer, 3 if fall, 4 if winter) Cross sectional study- data taken at one moment in time and studied. Time series study- data is collected and analyzed over a period of time.
