2.4 BIAS IN SURVEYS. The results of using a sample to make predictions or inferences about a population are only accurate if the sample is representative of the population. The methods for choosing the sample and collecting (measuring) the data must be free from BIAS. 2.4 BIAS IN SURVEYS.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Example – SAMPLING BIAS
An ad agency in a developing country wants to know what proportion of households have at least one computer. The survey was conducted by randomly selecting households from the telephone directory
MEASUREMENT BIAS - When the data collection method consistently over or underestimates the characteristic of the population
MEASUREMENT BIAS – Leading Question
When suggested answers to questions are listed in the question
a) Mario Striker b) Tetris
c) ESPN NHL 2K10 d) other
MEASUREMENT BIAS – Loaded Questions