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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. Each predicted y-hat tends to be fewer standard deviations from its mean than its corresponding x was from its mean






2. The number of individuals in a sample






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






4. Variables are said to be this if the conditional distribution of one variable is the same for each category of the other






5. Displays data that change over time






6. An observational study in which subjects are followed to observe future outcomes






7. A treatment known to have no effect - administered so that all groups experience the same conditions






8. Numerically valued attribute of a model






9. A sampling design in which the population is divided into several subpopulations - and random samples are then drawn from each stratum






10. Bias introduced to a sample when a large fraction of those sampled fails to respond






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






12. Adding a constant to each data value adds the same constant to the mean - the median - and the quartiles - but does not change the standard deviation or IQR






13. Manipulates factor levels to create treatments - randomly assigns subjects to these treatment levels - and then compares the responses of the subject groups across treatment levels






14. The differences between data values and the corresponding values predicted by the regression model; ____ = observed value - predicted value






15. A distribution that's roughly flat






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






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






18. A variable whose levels are controlled by the experimenter






19. A quantity or amount adopted as a standard of measurement - such as dollars - hours - or grams






20. 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






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






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






23. Individuals on whom an experiment is performed






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






25. A variable that names categories (whether with words or numerals)






26. An event is this if we know what outcomes could happen - but not which particular values will happen






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






28. The ith ___ is the number that falls above i% of the data






29. Places in order the effects that many re-expressions have on the data






30. Data points whose x-values are far from the mean of x are said to exert ____ on a linear model; with high enough ____ - residuals can appear to be deceptively small






31. A sampling design in which entire groups are chosen at random






32. 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






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






34. Consists of the individuals who are conveniently available






35. A sample is this if the statistics computed from it accurately reflect the corresponding population parameters






36. This corresponding to a z-score gives the percentage of values in a standard normal distribution found at that z-score or below






37. These are hard to generate - but several websites offer an unlimited supply of equally likely random values






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






39. A study that asks questions of a sample drawn from some population in the hope of learning something about the entire population






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






41. Summarized with the mean or the median






42. Value calculated from data to summarize aspects of the data






43. Extreme values that don't appear to belong with the rest of the data






44. A study based on data in which no manipulation of factors has been employed






45. The middle value with half of the data above and half below it






46. An individual about whom or which we have data






47. An equation or formula that simplifies and represents reality






48. The square root of the variance






49. Although linear models provide an easy way to predict values of y for a given value of x - it is unsafe to predict for values of x far from the ones used to find the linear model equation; predictions should not be trusted






50. Shows quantitative data values in a way that sketches the distribution of the data