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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 distribution is this if the two halves on either side of the center look approximately like mirror images of each other






2. Holds information about the same characteristic for many cases






3. 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






4. Control - randomize - replicate - block






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






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






7. Adding a constant to each data value adds the same constant to the mean - the median - and the quartiles - but does not change the standard deviation or IQR






8. 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






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






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






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






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






13. A sampling scheme that biases the sample in a way that gives a part of the population less representation than it has in the population






14. An equation or formula that simplifies and represents reality






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






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






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






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






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






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






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






22. 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






23. Numerically valued attribute of a model






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






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






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






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






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






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






30. If data consist of two or more groups that have been thrown together - it is usually best to fit different linear models to each group than to try to fit a single model to all of the data






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






32. The difference between the first and third quartiles






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






34. 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






35. Uses adjacent bars to show the distribution of vales in a quantitative variable; each bar represents the frequency (or relative frequency) of values falling in an interval of values






36. Useful family of models for unimodal - symmetric distributions






37. When an observed difference is too large for us to believe that is is likely to have occurred naturally






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






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. Sampling schemes that combine several sampling methods






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






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






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






44. Consists of the individuals who are conveniently available






45. Shows how a 'whole' divides into categories by showing a wedge of a circle whose area corresponds to the proportion in each category






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






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






48. Individuals on whom an experiment is performed






49. A variable whose levels are controlled by the experimenter






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