Probability
The chance of an event occuring, between 0 and 1
Probability
The avg. of a set of numbers
A graph used to display categories, with separate bars
Bar Graph
Smaller group selected from a larger population
Sample
Measure describing the strength and direction of a relationship between variables
Correlation
Probability of getting heads when flipping a fair coin
0.5
Middle value, when data is in order
Median
Graph that displays the dist. of data using side-to-side bars
Histogram
Entire group being studied
Population
A positive correlation means as one variable increases, the other:
Also increases
Two events that do not affect each other's outcomes are called these
Independent events
Most frequently occuring value
Mode
A graph commonly used to show trends over time.
Line Graph
Sample where everyone in the population has a chance of being selected
Simple Random Sample(SRS)
Value of a correlation coefficient that would imply no relationship
0
The probability of rolling a 2 on a standard six-sided die
1/6
Difference between the highest and lowest values in a data set
Range
This display shows the five-number summary and potential outliers.
Box Plot/Box & Whisker Plot
Error that occurs when the sampling is not done well.
Sampling Bias
Line that fits data in a scatterplot.
Least Squares Regression Line
The probability of at least one success is found by subtracting this from one
Probability of no successes
Average squared distance from the mean
Variance
A graph used to examine the relationship between two variables.
Scatterplot
Sampling method where the population is divided into groups, then people are randomly selected from each group.
Stratified Sampling
Reminder that relationship does not imply cause-and-effect
Correlation does not equal causation