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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. 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






2. The natural tendency of randomly drawn samples to differ






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






4. Individuals on whom an experiment is performed






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






6. Control - randomize - replicate - block






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






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






9. An equation of the form y-hat = b0 + b1x






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






11. Distributions with more than two modes






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






13. The difference between the lowest and highest values in a data set






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






15. The difference between the first and third quartiles






16. Shows the relationship between two quantitative variables measured on the same cases






17. The ____ we care about most is straight






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






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






20. A sampling design in which the population is divided into several subpopulations - and random samples are then drawn from each stratum






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






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






23. This criterion specifies the unique line that minimizes the variance of the residuals or - equivalently - the sum of the squared residuals






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






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






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






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






28. 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






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






30. Displays data that change over time






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






32. The square of the correlation between y and x; gives the fraction of the variability of y accounted for by the least squares linear regression on x; an overall measure of how successful the regression is in linearly relating y to x






33. 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






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






35. Any data point that stands away from the others; can be extraordinary by having a large residual or by having high leverage






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






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






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






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






40. 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






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






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






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






44. 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






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






46. Variables are said to be this if the conditional distribution of one variable is the same for each category of the other






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






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






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






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







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