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






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






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






4. Places in order the effects that many re-expressions have on the data






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






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






7. Doing this is equivalent to changing its units






8. Sampling schemes that combine several sampling methods






9. Design Randomization occurring within blocks






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






11. Distributions with two modes






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






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






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






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






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






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






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






19. Individuals on whom an experiment is performed






20. Any systematic failure of a sampling method to represent its population; common errors are voluntary response - undercoverage - nonresponse ____ - and response ____






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






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






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






24. The natural tendency of randomly drawn samples to differ






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






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






27. An individual about whom or which we have data






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






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






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






31. 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






32. 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






33. 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






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






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






36. The difference between the first and third quartiles






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






38. Consists of the minimum and maximum - the quartiles Q1 and Q3 - and the median






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






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






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






42. A hump or local high point in the shape of the distribution of a variable; the apparent locations of these can change as the scale of a histogram is changed






43. 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






44. 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






45. A variable that is not explicitly part of a model but affects the way the variables in the model appear to be related






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






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






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






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






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