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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 individual result of a component of a simulation






2. A display to help assess whether a distribution of data is approximately normal; if it is nearly straight - the data satisfy the nearly normal condition






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






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






5. Numerically valued attribute of a model






6. The natural tendency of randomly drawn samples to differ






7. 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






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






9. 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






10. When both those who could influence and evaluate the results are blinded






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






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






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






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






15. A sample drawn by selecting individuals systematically from a sampling frame






16. The number of individuals in a sample






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






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

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






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






21. An observational study in which subjects are selected and then their previous conditions or behaviors are determined






22. Distributions with more than two modes






23. Consists of the individuals who are conveniently available






24. 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






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






26. Displays data that change over time






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






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






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






30. The ____ we care about most is straight






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






32. 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






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






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






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






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






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






38. Control - randomize - replicate - block






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






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






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






42. Bias introduced to a sample when individuals can choose on their own whether to participate in the sample






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






44. An equation or formula that simplifies and represents reality






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






46. Distributions with two modes






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






48. A scatterplot shows an association that is this if there is little scatter around the underlying relationship






49. The entire group of individuals or instances about whom we hope to learn






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