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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. Doing this is equivalent to changing its units






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






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






4. Graphs a dot for each case against a single axis






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






6. Control - randomize - replicate - block






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






8. Found by substituting the x-value in the regression equation; they're the values on the fitted line






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






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






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






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






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






14. When both those who could influence and evaluate the results are blinded






15. Anything in a survey design that influences response






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






17. A sample that consists of the entire population






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






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






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






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






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






23. Useful family of models for unimodal - symmetric distributions






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






25. 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






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






27. The number of individuals in a sample






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






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






30. The parts of a distribution that typically trail off on either side; they can be characterized as long or short






31. A distribution that's roughly flat






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






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






34. The difference between the first and third quartiles






35. Holds information about the same characteristic for many cases






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






37. Bias introduced to a sample when individuals can choose on their own whether to participate in the sample






38. 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






39. A hump or local high point in the shape of the distribution of a variable; the apparent locations of these can change as the scale of a histogram is changed






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






41. Design Randomization occurring within blocks






42. Consists of the individuals who are conveniently available






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






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






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






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






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






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






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






50. Individuals on whom an experiment is performed