Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
10 Cards in this Set
- Front
- Back
|
Population
|
An entire collection of persons, things, or objects under study.
|
|
|
Sample/Sampling
|
A portion or subset of the population studied for information of the entire population.
|
|
|
Statistic
|
a number that is the property of a sample
e.g. if I have three class averages, then the one class average would be a statistic |
|
|
Parameter
|
a number that is the property of the population.
e.g. If I have three class averages, then the overall average would be a parameter of the population (entire sample). |
|
|
Representative Sample
|
the sample must contain the characteristics of the population in order to be an accurate representation of the population.
e.g. If I'm studying class averages for blacks, and I draw my sample from whites, then I do not have a representative sample. |
|
|
Variable
|
notated by capital letters like X, Y, Z, it is a characteristic of each person or thing in a population
|
|
|
Numerical Variables
|
values are in equal units such as weight in pounds or time in hours.
|
|
|
Categorical Variables
|
values that are more word oriented, such as Republican, Democrat, Pro-Life, Pro-Abortion, etc..
|
|
|
Data/Datum
|
actual values of a variable, they may be numbers or words
Datum is a single value |
|
|
Average/Proportion
|
Average: A number that summarizes overall value of various sets of numbers.
Proportion: A number (usually fraction) that expresses the relationship between two or more things. |
