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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. An arrangement of data in which each row represents a case and each column represents a variable






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






3. Any individual associated with an experiment who is not aware of how subjects have been allocated to treatment groups






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






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






6. Any data point that stands away from the others; can be extraordinary by having a large residual or by having high leverage






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






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






9. When an observed difference is too large for us to believe that is is likely to have occurred naturally






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






11. The best defense against bias - in which each individual is given a fair - random chance of selection






12. Gives the possible values of the variable and the frequency or relative frequency of each value






13. The natural tendency of randomly drawn samples to differ






14. Useful family of models for unimodal - symmetric distributions






15. A value that attempts the impossible by summarizing the entire distribution with a single number - a 'typical' value






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






17. Holds information about the same characteristic for many cases






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






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






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






21. An equation or formula that simplifies and represents reality






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






23. Design Randomization occurring within blocks






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






25. 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






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






27. Systematically recorded information - whether numbers or labels - together with its context






28. The sum of squared deviations from the mean - divided by the count minus one






29. Consists of the individuals who are conveniently available






30. In a statistical display - each data value should be represented by the same amount of area






31. Numerically valued attribute of a model






32. A hump or local high point in the shape of the distribution of a variable; the apparent locations of these can change as the scale of a histogram is changed






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






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






35. The experimental units assigned to a baseline treatment level - typically either the default treatment - which is well understood - or a null - placebo treatment






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






37. An individual result of a component of a simulation






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






39. The distribution of either variable alone in a contingency table; the counts or percentages are the totals found in the margins (last row or column) of the table






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






41. Individuals on whom an experiment is performed






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






43. All experimental units have an equal chance of receiving any treatment






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






45. A positive ____ or association means that - in general - as one variable increases - so does the other; when increases in one variable generally correspond to decreases in the other - the association is negative






46. 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






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






48. A list of individuals from whom the sample is drawn






49. Displays data that change over time






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