AP Statistics Exam Questions With
Verified Answers Already Passed!!
Statistical Significance CORRECT ANSWERS An observed effect too large to attribute
plausibly to chance.
Non-Response Bias CORRECT ANSWERS Bias introduced to a sample when a large
fraction of those sampled fails to respond.
P-Value CORRECT ANSWERS found by substituting the x-value in the regression
equation; they're the values on the fitted line
Empirical Rule CORRECT ANSWERS A statistical rule stating that for a normal
distribution, almost all data will fall within three standard deviations of the mean.
Lurking Variable CORRECT ANSWERS a variable that is not explicitly part of a model
but affects the way the variables in the model appear to be related
Null Hypothesis CORRECT ANSWERS The null hypothesis attempts to show that no
variation exists between variables, or that a single variable is no different than zero. It is
presumed to be true until statistical evidence nullifies it for an alternative hypothesis.
Quota Sample CORRECT ANSWERS A sampling method of gathering representative
data from a group. As opposed to random sampling, quota sampling requires that
representative individuals are chosen out of a specific subgroup.
Probability CORRECT ANSWERS Quantifiable likelihood (chance) of the occurrence of
an event expressed as odds, or a fraction of 1.
Descriptive Statistics CORRECT ANSWERS The branch of statistics that includes
numerical, graphical, and tabular methods for organizing and summarizing data
Median CORRECT ANSWERS the middle value with half of the data above and half
below it
Stemplot CORRECT ANSWERS A table in which data values are divided into either a
"leaf" or a "stem." In a stem and leaf plot, the stem values appear on the vertical axis
and the leaf values are listed on the horizontal axis.
Data CORRECT ANSWERS systematically recorded information, whether numbers or
labels, together with its context
Margin of Error CORRECT ANSWERS Analytical technique that accounts for the
number of acceptable errors in an experiment.
, Normal CORRECT ANSWERS Normal distribution with mean of zero and variance of
one.
Simple Random Sample (SRS) CORRECT ANSWERS this of sample size n is one in
which each set of n elements in the population has an equal chance of selection
Sampling Distributon CORRECT ANSWERS A type of distribution that involves the
probability distribution of sample statistics based on randomly selected samples.
Interpolation CORRECT ANSWERS Estimation of an unknown quantity between two
known quantities (historical data), or drawing conclusions about missing information
from the available information.
Qualitative CORRECT ANSWERS involving distinctions based on qualities
Theoretical Probability CORRECT ANSWERS Probability based on comparing the
number of possible favorable outcomes to the number of total possible outcomes
Block Design CORRECT ANSWERS the random assignment of units to treatments is
carried out separately within each block
Least Squares Regression Line CORRECT ANSWERS the line that makes the sum of
the squares of the vertical distances of the data points from the line as small as possible
Type II Error CORRECT ANSWERS An error that occurs when a researcher concludes
that the independent variable had no effect on the dependent variable, when in truth it
did; a "false negative" (Source: CHH, 2 Ed).
Histogram CORRECT ANSWERS a bar chart representing a frequency distribution
Undercoverage CORRECT ANSWERS A sampling scheme that biases the sample in a
way that gives a part of the population less representation than it has in the population
Joint Frequency CORRECT ANSWERS Number of cases with given values on two or
more variables.
Matched Pairs CORRECT ANSWERS a technique whereby each participant is identical
to one other participant in terms of a third variable
Conditional Probability CORRECT ANSWERS the probability that an event will occur
given that one or more other events have occurred
Mode CORRECT ANSWERS the most frequent value of a random variable
Verified Answers Already Passed!!
Statistical Significance CORRECT ANSWERS An observed effect too large to attribute
plausibly to chance.
Non-Response Bias CORRECT ANSWERS Bias introduced to a sample when a large
fraction of those sampled fails to respond.
P-Value CORRECT ANSWERS found by substituting the x-value in the regression
equation; they're the values on the fitted line
Empirical Rule CORRECT ANSWERS A statistical rule stating that for a normal
distribution, almost all data will fall within three standard deviations of the mean.
Lurking Variable CORRECT ANSWERS a variable that is not explicitly part of a model
but affects the way the variables in the model appear to be related
Null Hypothesis CORRECT ANSWERS The null hypothesis attempts to show that no
variation exists between variables, or that a single variable is no different than zero. It is
presumed to be true until statistical evidence nullifies it for an alternative hypothesis.
Quota Sample CORRECT ANSWERS A sampling method of gathering representative
data from a group. As opposed to random sampling, quota sampling requires that
representative individuals are chosen out of a specific subgroup.
Probability CORRECT ANSWERS Quantifiable likelihood (chance) of the occurrence of
an event expressed as odds, or a fraction of 1.
Descriptive Statistics CORRECT ANSWERS The branch of statistics that includes
numerical, graphical, and tabular methods for organizing and summarizing data
Median CORRECT ANSWERS the middle value with half of the data above and half
below it
Stemplot CORRECT ANSWERS A table in which data values are divided into either a
"leaf" or a "stem." In a stem and leaf plot, the stem values appear on the vertical axis
and the leaf values are listed on the horizontal axis.
Data CORRECT ANSWERS systematically recorded information, whether numbers or
labels, together with its context
Margin of Error CORRECT ANSWERS Analytical technique that accounts for the
number of acceptable errors in an experiment.
, Normal CORRECT ANSWERS Normal distribution with mean of zero and variance of
one.
Simple Random Sample (SRS) CORRECT ANSWERS this of sample size n is one in
which each set of n elements in the population has an equal chance of selection
Sampling Distributon CORRECT ANSWERS A type of distribution that involves the
probability distribution of sample statistics based on randomly selected samples.
Interpolation CORRECT ANSWERS Estimation of an unknown quantity between two
known quantities (historical data), or drawing conclusions about missing information
from the available information.
Qualitative CORRECT ANSWERS involving distinctions based on qualities
Theoretical Probability CORRECT ANSWERS Probability based on comparing the
number of possible favorable outcomes to the number of total possible outcomes
Block Design CORRECT ANSWERS the random assignment of units to treatments is
carried out separately within each block
Least Squares Regression Line CORRECT ANSWERS the line that makes the sum of
the squares of the vertical distances of the data points from the line as small as possible
Type II Error CORRECT ANSWERS An error that occurs when a researcher concludes
that the independent variable had no effect on the dependent variable, when in truth it
did; a "false negative" (Source: CHH, 2 Ed).
Histogram CORRECT ANSWERS a bar chart representing a frequency distribution
Undercoverage CORRECT ANSWERS A sampling scheme that biases the sample in a
way that gives a part of the population less representation than it has in the population
Joint Frequency CORRECT ANSWERS Number of cases with given values on two or
more variables.
Matched Pairs CORRECT ANSWERS a technique whereby each participant is identical
to one other participant in terms of a third variable
Conditional Probability CORRECT ANSWERS the probability that an event will occur
given that one or more other events have occurred
Mode CORRECT ANSWERS the most frequent value of a random variable
