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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. 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






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






3. 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






4. Done to eliminate units; values can be compared and combined even if the original variables had different units and magnitudes






5. Lists the categories in a categorical variable and gives the count or percentage of observations for each category






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






7. 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






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






9. The linear equation y-hat = b0 + b1x that satisfies the least squares criterion






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






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






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






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






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






15. A variable whose values are compared across different treatments






16. 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






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






18. An individual about whom or which we have data






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

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






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






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






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






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






25. Doing this is equivalent to changing its units






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






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






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






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






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






31. Shows how a 'whole' divides into categories by showing a wedge of a circle whose area corresponds to the proportion in each category






32. An equation or formula that simplifies and represents reality






33. Gives a value in 'y-units per x-unit'; changes of one unit in x are associated with changes of b1 units in predicted values of y






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






35. Summarized with the mean or the median






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






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






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






39. Distributions with two modes






40. The number of individuals in a sample






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






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






43. A variable whose levels are controlled by the experimenter






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






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






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






47. 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






48. The difference between the first and third quartiles






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






50. Shows a bar representing the count of each category in a categorical variable