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






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






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






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






5. The ____ we care about most is straight






6. 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






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






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






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






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






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






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






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






14. An individual result of a component of a simulation






15. An individual about whom or which we have data






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






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






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






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






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






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






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






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






24. Summarized with the mean or the median






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






26. This of sample size n is one in which each set of n elements in the population has an equal chance of selection






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






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






29. 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






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






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






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






33. Values of this record the results of each trial with respect to what we were interested in






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






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






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






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






38. When the levels of one factor are associated with the levels of another factor so their effects cannot be separated






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






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






41. A variable whose levels are controlled by the experimenter






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






43. A sample that consists of the entire population






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






45. 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






46. Although linear models provide an easy way to predict values of y for a given value of x - it is unsafe to predict for values of x far from the ones used to find the linear model equation; predictions should not be trusted






47. Numerically valued attribute of a model






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






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






50. Consists of the individuals who are conveniently available







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