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AP Statistics Vocab

Subjects : statistics, ap
Instructions:
  • Answer 50 questions in 15 minutes.
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  • 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 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






2. Summarized with the mean or the median






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






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


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






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






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






8. The difference between the first and third quartiles






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






10. Useful family of models for unimodal - symmetric distributions






11. 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






12. Sampling schemes that combine several sampling methods






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






14. Control - randomize - replicate - block






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






16. The number of individuals in a sample






17. An individual about whom or which we have data






18. Consists of the individuals who are conveniently available






19. Holds information about the same characteristic for many cases






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






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






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






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






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






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






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






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






28. 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






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






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






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






32. Anything in a survey design that influences response






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






34. Design Randomization occurring within blocks






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






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






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






38. A distribution is this if it's not symmetric and one tail stretches out farther than the other






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






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






41. 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






42. A variable whose levels are controlled by the experimenter






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






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






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






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






47. A point that does not fit the overall pattern seen in the scatterplot






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






49. 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






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