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






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






3. Design Randomization occurring within blocks






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






5. The number of individuals in a sample






6. Individuals on whom an experiment is performed






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






8. 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






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






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






11. Distributions with more than two modes






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






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






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






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






16. 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






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






18. The square root of the variance






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






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






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






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






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






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






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






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






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






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






29. Tells how many standard deviations a value is from the mean; have a mean of zero and a standard deviation of one






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






31. 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






32. Distributions with two modes






33. An observational study in which subjects are selected and then their previous conditions or behaviors are determined






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






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






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






37. 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






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






39. The ____ we care about most is straight






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






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






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






43. Useful family of models for unimodal - symmetric distributions






44. An individual result of a component of a simulation






45. Manipulates factor levels to create treatments - randomly assigns subjects to these treatment levels - and then compares the responses of the subject groups across treatment levels






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






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






48. A variable whose levels are controlled by the experimenter






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






50. The entire group of individuals or instances about whom we hope to learn