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AP Statistics Vocab

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. Numerically valued attribute of a model






2. Ideally tells who was measured - what was measured - how the data were collected - where the data were collected - and when and why the study was performed






3. Any systematic failure of a sampling method to represent its population; common errors are voluntary response - undercoverage - nonresponse ____ - and response ____






4. When either those who could influence or evaluate the results is blinded






5. To describe this aspect of a distribution - look for single vs. multiple modes - and symmetry vs. skewness






6. A representative subset of a population - examined in hope of learning about the population






7. The process - intervention - or other controlled circumstance applied to randomly assigned experimental units






8. A numerically valued attribute of a model for a population






9. Displays the 5-number summary as a central box with whiskers that extend to the non-outlying data values






10. Distributions with two modes






11. Values of this record the results of each trial with respect to what we were interested in






12. When groups of experimental units are similar - it is a good idea to gather them together into these






13. Lists the categories in a categorical variable and gives the count or percentage of observations for each category






14. Any attempt to force a sample to resemble specified attributes of the population






15. A numerical summary of how tightly the values are clustered around the 'center'






16. Summarized with the standard deviation - interquartile range - and range






17. 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






18. Multiplying each data value by a constant multiplies both the measures of position and the measures of spread by that constant






19. Anything in a survey design that influences response






20. Graphs a dot for each case against a single axis






21. Value found by subtracting the mean and dividing by the standard deviation






22. This criterion specifies the unique line that minimizes the variance of the residuals or - equivalently - the sum of the squared residuals






23. A numerical measure of the direction and strength of a linear association






24. Having one mode; this is a useful term for describing the shape of a histogram when it's generally mound-shaped






25. To be valid - an experiment must assign experimental units to treatment groups at random






26. The most basic situation in a simulation in which something happens at random






27. A variable whose levels are controlled by the experimenter






28. Displays data that change over time






29. A normal model with a mean of 0 and a standard deviation of 1






30. Found by substituting the x-value in the regression equation; they're the values on the fitted line






31. A variable other than x and y that simultaneously affects both variables - accounting for the correlation between the two






32. An equation of the form y-hat = b0 + b1x






33. A variable in which the numbers act as numerical values; always has units






34. The parts of a distribution that typically trail off on either side; they can be characterized as long or short






35. The distribution of a variable restricting the who to consider only a smaller group of individuals






36. Tells how many standard deviations a value is from the mean; have a mean of zero and a standard deviation of one






37. A variable that is not explicitly part of a model but affects the way the variables in the model appear to be related






38. Consists of the minimum and maximum - the quartiles Q1 and Q3 - and the median






39. The sequence of several components representing events that we are pretending will take place






40. The linear equation y-hat = b0 + b1x that satisfies the least squares criterion






41. 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






42. A distribution is this if the two halves on either side of the center look approximately like mirror images of each other






43. Shows the relationship between two quantitative variables measured on the same cases






44. Individuals on whom an experiment is performed






45. When the levels of one factor are associated with the levels of another factor so their effects cannot be separated






46. A distribution is this if it's not symmetric and one tail stretches out farther than the other






47. The tendency of many human subjects (often 20% or more of experiment subjects) to show a response even when administered a placebo






48. The difference between the lowest and highest values in a data set






49. In a retrospective or prospective study Subjects who are similar in ways not under study may be ____ and then compared with each other on the variables of interest






50. A variable whose values are compared across different treatments