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






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






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






4. A value that attempts the impossible by summarizing the entire distribution with a single number - a 'typical' value






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






6. 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






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






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






9. 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






10. A numerical measure of the direction and strength of a linear association






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






12. The tendency of many human subjects (often 20% or more of experiment subjects) to show a response even when administered a placebo






13. The square root of the variance






14. Numerically valued attribute of a model






15. 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






16. Any data point that stands away from the others; can be extraordinary by having a large residual or by having high leverage






17. A distribution that's roughly flat






18. An individual result of a component of a simulation






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






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






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






22. Displays data that change over time






23. 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






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






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






26. The experimental units assigned to a baseline treatment level - typically either the default treatment - which is well understood - or a null - placebo treatment






27. The ____ we care about most is straight






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






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






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






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






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






33. An individual about whom or which we have data






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






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






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






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






38. The number of individuals in a sample






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






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






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






42. 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






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






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






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






46. Anything in a survey design that influences response






47. 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






48. Holds information about the same characteristic for many cases






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






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






Can you answer 50 questions in 15 minutes?



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