A.P. Statistics Curves and Distribution (Chapter Three) Key Words
standardizing
converting units from original values to standard deviation units
standardized value
z score of the value.
z - score
standardized value
Chebyshev's inequality
the percent of o
A.P. Statistics Least Squares Regression (Chapter Five) Key Words
least-squares regression
a straight line that describes how a response variable y changes as an explanatory variable x
changes. Often used to predict the value of y for a given value x. unl
A.P. Statistics Population and Samples (Chapter Six) Key Words
Population
In a statistical study, the population is the entire group of individuals about which we want
information.
Sample
The part of the population from which we actually collect informati
A.P. Statistics Intro to Statistics (Chapter One) Key Words
round off error
the error that occurs when the percents don't add up to 100%
pie chart
This must include all the categories that make up a whole. Use this only when you want to
emphasize each cat
A.P. Statistics Pairs and Errors (Chapter Eight) Key Words
Matched Pairs
A common form of blocking for comparing just two treatments. In some matched pairs designs,
each subject receives both treatments in a random order. In others, the subjects are match
A.P. Statistics Probability (Chapter Nine) Key Words
The idea of probability
chance behavior is unpredictable in the short run but has a regular and predictable pattern in the
long run. Empirical. Based on observation rather than theorizing.
Random
indivi
A.P. Statistics Confidence Levels and Formulas (Chapter Ten) Key Words
Confidence level C
The success rate of the method that produces the confidence interval. In C% of all possible
samples, the method would yield an interval that captures the true parame
A.P. Statistics Modes and Standard Deviation (Chapter Two) Key Words
modes
one or several major peaks
unimodal
a description of a distribution with one major peak
symmetric
a description of a distribution where the values smaller and larger than its midpo
A.P. Statistics Correlation and Variables (Chapter Four) Key Words
response variable
measures an outcome of a study. independent variable.
explanatory variable
attempts to explain the observed outcomes. dependent variable.
how to examine data
plot the dat
A.P. Statistics Experiments and Factors (Chapter Seven) Key Words
Experiment
Deliberately imposes some treatment on individuals to measure their responses.
Lurking Variable
A variable that is not among the explanatory or response variables in a study but