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






3. In a normal model - about 68% of values fall within 1 standard deviation of the mean - about 95% fall within 2 standard deviations of the mean - and about 99.7% fall within 3 standard deviations of the mean






4. Numerically valued attribute of a model






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






6. Design Randomization occurring within blocks






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






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






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






10. Anything in a survey design that influences response






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






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






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






14. 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






15. Gives a value in 'y-units per x-unit'; changes of one unit in x are associated with changes of b1 units in predicted values of y






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






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






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






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






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






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






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






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






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






26. Lists the categories in a categorical variable and gives the count or percentage of observations for each category






27. An individual result of a component of a simulation






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






29. Individuals on whom an experiment is performed






30. Consists of the individuals who are conveniently available






31. When averages are taken across different groups - they can appear to contradict the overall averages

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






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






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






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






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






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






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






39. 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






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






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






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






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






44. The ith ___ is the number that falls above i% of the data






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






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






47. Distributions with two modes






48. The difference between the lowest and highest values in a data set






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






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