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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. Holds information about the same characteristic for many cases






2. Anything in a survey design that influences response






3. Displays data that change over time






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






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






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

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






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






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






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






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






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






13. A variable whose levels are controlled by the experimenter






14. A sample that consists of the entire population






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






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






17. Distributions with more than two modes






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






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






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






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






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






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






24. A distribution that's roughly flat






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






26. Uses adjacent bars to show the distribution of vales in a quantitative variable; each bar represents the frequency (or relative frequency) of values falling in an interval of values






27. An individual result of a component of a simulation






28. An equation or formula that simplifies and represents reality






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






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






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






32. A variable whose values are compared across different treatments






33. The square root of the variance






34. 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






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






36. 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






37. 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






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






39. Consists of the individuals who are conveniently available






40. Summarized with the mean or the median






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






42. 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






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






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






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






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






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






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






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






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







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