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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. 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






2. A variable whose values are compared across different treatments






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






4. A study that asks questions of a sample drawn from some population in the hope of learning something about the entire population






5. Consists of the individuals who are conveniently available






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






7. Distributions with two modes






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






9. 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






10. An individual result of a component of a simulation






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






12. Distributions with more than two modes






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






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






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






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






17. 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






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






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






20. Found by summing all the data values and dividing by the count






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






22. 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






23. 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






24. A variable other than x and y that simultaneously affects both variables - accounting for the correlation between the two






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






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






27. Control - randomize - replicate - block






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






29. Displays data that change over time






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






31. A variable whose levels are controlled by the experimenter






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






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






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






35. 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






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






37. Summarized with the mean or the median






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






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






40. Numerically valued attribute of a model






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






42. The ____ we care about most is straight






43. We do this by taking the logarithm - the square root - the reciprocal - or some other mathematical operation on all values in the data set






44. A distribution that's roughly flat






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






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






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






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






49. Value found by subtracting the mean and dividing by the standard deviation






50. Anything in a survey design that influences response