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






3. 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






4. Multiplying each data value by a constant multiplies both the measures of position and the measures of spread by that constant






5. Numerically valued attribute of a model






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






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






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






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






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






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






12. A variable whose values are compared across different treatments






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






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






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






16. 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






17. The ____ we care about most is straight






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






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






20. A variable whose levels are controlled by the experimenter






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






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






23. 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






24. A distribution that's roughly flat






25. Control - randomize - replicate - block






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






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






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






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






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






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






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






33. An individual about whom or which we have data






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






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






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






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






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






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






40. The number of individuals in a sample






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






42. Doing this is equivalent to changing its units






43. Consists of the individuals who are conveniently available






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






45. Values of this record the results of each trial with respect to what we were interested in






46. 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






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






48. Useful family of models for unimodal - symmetric distributions






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






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







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