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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. The square root of the variance






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






3. Sampling schemes that combine several sampling methods






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






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






6. 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






7. This - b0 - gives a starting value in y-units; it's the y-hat-value when x is 0






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






9. The number of individuals in a sample






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






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






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






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






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






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






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






17. The difference between the first and third quartiles






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






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






20. An event is this if we know what outcomes could happen - but not which particular values will happen






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






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






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






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






25. Design Randomization occurring within blocks






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






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






28. Summarized with the mean or the median






29. Shows quantitative data values in a way that sketches the distribution of the data






30. Control - randomize - replicate - block






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






32. An individual result of a component of a simulation






33. 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






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






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






36. 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






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






38. 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






39. 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






40. 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






41. To describe this aspect of a distribution - look for single vs. multiple modes - and symmetry vs. skewness






42. Displays counts and - sometimes - percentages of individuals falling into named categories on two or more variables; categorizes the individuals on all variables at once - to reveal possible patterns in one variable that may be contingent on the cate






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






44. Useful family of models for unimodal - symmetric distributions






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






46. Displays data that change over time






47. A variable whose values are compared across different treatments






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






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






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