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Test your basic knowledge |
AP Statistics Vocab
Start Test
Study First
Subjects
:
statistics
,
ap
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. A value that attempts the impossible by summarizing the entire distribution with a single number - a 'typical' value
center
matched
influential point
control group
2. The ith ___ is the number that falls above i% of the data
standard deviation
outlier
interquartile range
percentile
3. A quantity or amount adopted as a standard of measurement - such as dollars - hours - or grams
bias
units
undercoverage
response
4. Design Randomization occurring within blocks
randomized block
subset
outliers
slope
5. An observational study in which subjects are selected and then their previous conditions or behaviors are determined
conditional distribution
changing center and spread
retrospective study
stratified random sample
6. A variable whose values are compared across different treatments
principles of experimental design
response
matching
multistage sample
7. We do this by taking the logarithm - the square root - the reciprocal - or some other mathematical operation on all values in the data set
strength
blinding
re-express data
slope
8. The natural tendency of randomly drawn samples to differ
prospective study
context
sampling variability
placebo
9. A sample that consists of the entire population
bar chart
stem-and-leaf display
regression to the mean
census
10. When an observed difference is too large for us to believe that is is likely to have occurred naturally
placebo effect
statistically significant
independence
predicted value
11. A point that does not fit the overall pattern seen in the scatterplot
simple random sample
dotplot
outlier
statistic
12. In a normal model - about 68% of values fall within 1 standard deviation of the mean - about 95% fall within 2 standard deviations of the mean - and about 99.7% fall within 3 standard deviations of the mean
mode
least squares
68-95-99.7 rule
pie chart
13. Value found by subtracting the mean and dividing by the standard deviation
distribution
standardized value
outlier
nonresponse bias
14. A scatterplot shows an association that is this if there is little scatter around the underlying relationship
retrospective study
normal percentile
subset
strength
15. A variable that names categories (whether with words or numerals)
sampling frame
lurking variable
categorical variable
interquartile range
16. A study based on data in which no manipulation of factors has been employed
distribution
median
boxplot
observational study
17. In a statistical display - each data value should be represented by the same amount of area
quartile
context
area principle
regression line
18. A sampling design in which the population is divided into several subpopulations - and random samples are then drawn from each stratum
blinding
undercoverage
stratified random sample
prospective study
19. Any systematic failure of a sampling method to represent its population; common errors are voluntary response - undercoverage - nonresponse ____ - and response ____
mode
bias
randomization
form
20. This - b0 - gives a starting value in y-units; it's the y-hat-value when x is 0
completely randomized design
single-blind
intercept
comparing distributions
21. A sample drawn by selecting individuals systematically from a sampling frame
standard normal model
normal model
systematic sample
quantitative variable
22. The number of individuals in a sample
5-number summary
shape
sample size
confounded
23. A variable whose levels are controlled by the experimenter
center
experiment
factor
skewed
24. Anything in a survey design that influences response
multimodal
population
response bias
prospective study
25. When the levels of one factor are associated with the levels of another factor so their effects cannot be separated
form
confounded
leverage
direction
26. The best defense against bias - in which each individual is given a fair - random chance of selection
statistically significant
lurking variable
randomization
census
27. Having one mode; this is a useful term for describing the shape of a histogram when it's generally mound-shaped
pie chart
unimodal
z-score
subset
28. Lists the categories in a categorical variable and gives the count or percentage of observations for each category
randomization
distribution
frequency table
spread
29. Bias introduced to a sample when a large fraction of those sampled fails to respond
nonresponse bias
undercoverage
residuals
timeplot
30. The experimental units assigned to a baseline treatment level - typically either the default treatment - which is well understood - or a null - placebo treatment
range
control group
single-blind
unimodal
31. Models random events by using random numbers to specify event outcomes with relative frequencies that correspond to the true real-world relative frequencies we are trying to model
lurking variable
simulation
multimodal
range
32. The linear equation y-hat = b0 + b1x that satisfies the least squares criterion
stratified random sample
regression line
random
context
33. Summarized with the standard deviation - interquartile range - and range
simulation component
spread
stem-and-leaf display
distribution
34. Values of this record the results of each trial with respect to what we were interested in
census
categorical variable
response variable
r2
35. Displays the 5-number summary as a central box with whiskers that extend to the non-outlying data values
sample
census
systematic sample
boxplot
36. The specific values that the experimenter chooses for a factor
level
re-express data
retrospective study
normal probability plot
37. The lower of this is the value with a quarter of the data below it; the upper of this has a quarter of the data above it
quartile
simulation
correlation
population parameter
38. Consists of the minimum and maximum - the quartiles Q1 and Q3 - and the median
regression to the mean
voluntary response bias
5-number summary
ladder of powers
39. Holds information about the same characteristic for many cases
dotplot
simulation
variable
statistic
40. Displays counts and - sometimes - percentages of individuals falling into named categories on two or more variables; categorizes the individuals on all variables at once - to reveal possible patterns in one variable that may be contingent on the cate
contingency table
random
simulation
units
41. Shows how a 'whole' divides into categories by showing a wedge of a circle whose area corresponds to the proportion in each category
changing center and spread
data
pie chart
statistic
42. A normal model with a mean of 0 and a standard deviation of 1
confounded
boxplot
standard normal model
outlier
43. Distributions with two modes
intercept
interquartile range
outlier
bimodal
44. Uses adjacent bars to show the distribution of vales in a quantitative variable; each bar represents the frequency (or relative frequency) of values falling in an interval of values
representative
prospective study
histogram
influential point
45. An equation of the form y-hat = b0 + b1x
linear model
prospective study
outcome
area principle
46. A representative subset of a population - examined in hope of learning about the population
68-95-99.7 rule
sample
influential point
double-blind
47. Consists of the individuals who are conveniently available
convenience sample
residuals
variance
multimodal
48. Extreme values that don't appear to belong with the rest of the data
outliers
variance
tails
outlier
49. Numerically valued attribute of a model
parameter
retrospective study
range
regression to the mean
50. Bias introduced to a sample when individuals can choose on their own whether to participate in the sample
experimental units
voluntary response bias
slope
distribution