Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Stats Ch 9

TermDefinition
Population The entire group of individuals or instances about whom we hope to learn.
Sample A representative subset of the population.
Sample Survey A study that asks questions of a sample drawn from some population in the hope of learning something about the entire population.
Bias Any systematic failure of a sampling method to represent the population.
Randomization The best defense against bias where each individual is given a fair, random chance of selection.
Sample Size The number of individuals in a sample.
Census A sample that consists of the entire population.
Population Parameter A numerical attribute of a model for a population.
Sample Statistic Numerical summary calculated from sample data.
Representative A sample where the statistics computed accurately reflect the corresponding population parameters.
Simple Random Sample A sample in which every person has an equal probability of being selected as part of the sample.
Sampling Frame A list of individuals from whom the sample is drawn.
Sampling Variability The natural tendency of randomly drawn samples to differ from one another.
Stratified Random Sample A sample in which the population is divided into several subgroups that share a common characteristic, then a random sample is taken on each subgroup.
Cluster Sample A sample in which entire groups are selected at random, then a census is administered on that subgroup.
Multistage Sample A sample that combines several sampling techniques.
Systematic Sample A sample in which individuals are drawn from the population according to some nonrandom algorithm.
Pilot Study A small trial run of a survey to check whether the questions are clear and unbiased.
Voluntary Response Bias Bias introduced when individuals decide on their own that they want to be part of a sample.
Convenience Sample A sample consisting of individuals who are readily available.
Undercoverage Bias introduced when a portion of the population has less representation in the sample than the population.
Nonresponse Bias Bias introduced when a large portion of the sample simply do not participate.
Response Bias Bias created when anything in a survey design influences responses.
Created by: HowardGeometry