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Stats Vocab Word Scramble

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Question	Answer
Population	The group of individuals that we hope to learn about
Sample	A part of the population that we examine in hope to learn about the population
Sample survey	Questions that are given to a sample in hope of learning something about the entire population. EX: Polls
4 types of Bias	1) Relying on Voluntary response 2)undercoverage of the population 3) nonresponse bias 4) response bias
Randomization	The best defense against bias. Each individual is given a fair, random chance of being select
Matching	Force a sample to resemble specific attribute
Sample size	# of individual in a sample.
Census	A sample that consist of the entire population
Population parameter	EX: the mean income of all employed people in the country
Statistic, sample statistic	values calculated for sampled data
Representative	a sample is representative if the statistics computed from it accurately reflect the corresponding population parameters
Simple random sample	each set of (n) elements in the population has an equal chance of being selected
Sampling frame	Lists of individuals from the sample
Stratified random sample	population is divided into several strata, and random samples are drawn from each stratum.
Cluster sample	entire groups or clusters are chosen at random
Systematic sample	selecting individuals systematically from a sampling frame
Multistage sample	sampling schemes that combine several sampling methods
Voluntary response bias	individuals can choose on their own whether to participate in the sample. Sample base on voluntary response is always invalid.
Convenience sample	individuals who are conveniently available. Not representative because every individual is not equally convenient to sample
Nonresponse bias	large fraction of those sampled fail to respond. Those who do response are likely not to represent the entire sample
Response bias	The people tell lies because you asked a sensitive question. EX: Do you do drugs?
Sampling variability	tendency of randomly drawn samples to differ, one from another.
interviewer bias	the person you having conducting the interview makes the person hesitant to answer the questions
Reporting Bias	the individual tends to round when answering