Save
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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
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

Unit 10

Sampling, Inferences, and Comparing Populations

TermDefinition
mean The sum of a set of data points divided by the number of data points. (Also known as average)
median The middle number or the mean of the two middle numbers in an ordered set of data.
compare To note the similarities or differences of.
population The entire group of people or things that are being analyzed.
sample Part of the population upon which an experiment or survey is conducted.
survey Method to collect data from a sample or population to study some characteristics of the group.
representative samples A subset of a statistical population that accurately reflects the members of the entire population.
biased sample A sample collected in such a way that some members of the intended population are less likely to be included than others.
unbiased sample A sample collected in such a way that all members of the intended population have a fair opportunity to be included in the sample as others.
inference A conclusion reached on the basis of evidence and reasoning.
simple random sampling A part of a population chosen randomly and entirely by chance where each member of the subgroup has an equal opportunity to be chosen at any stage during the sampling process. (Example: draw a name from a hat)
systematic random sampling A part of a population chosen by fixed intervals where each member of the subgroup has an equal opportunity to be chosen at any stage during the sampling process. (Example: select every tenth person)
stratified random sampling A part of a population chosen by grouping the population then choosing randomly where each member of the subgroup has an equal opportunity to be chosen at any stage during the sampling process. (Example: Select an equal number of boys and girls)
draw inference To make a conclusion through observation and reasoning.
characteristic A feature or quality belonging typically to a person, place, or thing.
observe To watch, view, and note for a purpose.
variability The extent to which data points in a data set spread out from the mean value.
range The difference between the lowest and highest values in a data set.
mean absolute deviation (MAD) The average of the distance between the data points of a data set and the mean of the same data set.
absolute value The distance a number is from zero.
similar Resembling without being identical.
box-and-whisker plot A graphic way to show how data is distributed by using the median, quartiles, and minimum and maximum values on a number line.
quartile The median of the upper or lower half of a data set.
second quartile The median of the data set which divides the data set in half.
First quartile The median of the lower half of a data set.
Third Quartile The median of the upper half of a data set.
valid A point of view that can be supported with facts.
outlier A data value that is far removed from the rest of the data.
predictable Able to estimate a future event.
analyze Examine to gather information from.
Created by: Mrs Ott
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards