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






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






3. 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






4. The ____ we care about most is straight






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






6. Design Randomization occurring within blocks






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






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






9. The natural tendency of randomly drawn samples to differ






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






11. The square root of the variance






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






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






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






15. A variable that is not explicitly part of a model but affects the way the variables in the model appear to be related






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






17. The lower of this is the value with a quarter of the data below it; the upper of this has a quarter of the data above it






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






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






20. 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






21. Although linear models provide an easy way to predict values of y for a given value of x - it is unsafe to predict for values of x far from the ones used to find the linear model equation; predictions should not be trusted






22. Control - randomize - replicate - block






23. 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






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






25. Anything in a survey design that influences response






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






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






28. Numerically valued attribute of a model






29. Summarized with the mean or the median






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






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






32. An individual about whom or which we have data






33. 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






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






35. A variable whose values are compared across different treatments






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






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






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






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






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






41. A distribution that's roughly flat






42. An equation or formula that simplifies and represents reality






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






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






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






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






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






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






49. In a retrospective or prospective study Subjects who are similar in ways not under study may be ____ and then compared with each other on the variables of interest






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