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






2. Anything in a survey design that influences response






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






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






5. 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






6. A sample that consists of the entire population






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






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






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






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






11. The ____ we care about most is straight






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






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






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

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






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






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






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






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






20. Summarized with the mean or the median






21. 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






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






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






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






25. Data points whose x-values are far from the mean of x are said to exert ____ on a linear model; with high enough ____ - residuals can appear to be deceptively small






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






27. 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






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






29. Numerically valued attribute of a model






30. Displays data that change over time






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






32. 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






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






34. An arrangement of data in which each row represents a case and each column represents a variable






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






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






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






38. Sampling schemes that combine several sampling methods






39. Individuals on whom an experiment is performed






40. The number of individuals in a sample






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






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






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






44. A variable whose values are compared across different treatments






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






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






47. A variable that names categories (whether with words or numerals)






48. Design Randomization occurring within blocks






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






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