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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. A sample that consists of the entire population






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






3. The specific values that the experimenter chooses for a factor






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






5. 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






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






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






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






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






10. 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






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






12. 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






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






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






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






16. 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






17. Doing this is equivalent to changing its units






18. When averages are taken across different groups - they can appear to contradict the overall averages

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






20. A point that does not fit the overall pattern seen in the scatterplot






21. A variable whose values are compared across different treatments






22. Displays data that change over time






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






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






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






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






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






29. Design Randomization occurring within blocks






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






31. 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






32. When omitting a point from the data results in a very different regression model - the point is an ____






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






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






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






36. The number of individuals in a sample






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






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






39. Anything in a survey design that influences response






40. The square of the correlation between y and x; gives the fraction of the variability of y accounted for by the least squares linear regression on x; an overall measure of how successful the regression is in linearly relating y to x






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






42. Individuals on whom an experiment is performed






43. When doing this - consider their shape - center - and spread






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






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






46. Summarized with the mean or the median






47. 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






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






49. If data consist of two or more groups that have been thrown together - it is usually best to fit different linear models to each group than to try to fit a single model to all of the data






50. 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