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






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






3. 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






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






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






6. 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






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






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






9. Consists of the individuals who are conveniently available






10. An individual result of a component of a simulation






11. Useful family of models for unimodal - symmetric distributions






12. Displays data that change over time






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






14. Distributions with more than two modes






15. Distributions with two modes






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






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






18. A point that does not fit the overall pattern seen in the scatterplot






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






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






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






22. 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






23. A distribution that's roughly flat






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






25. When groups of experimental units are similar - it is a good idea to gather them together into these






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






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






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






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






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






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






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






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






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






35. The square root of the variance






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






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






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

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






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






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






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






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






44. Anything in a survey design that influences response






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






46. A list of individuals from whom the sample is drawn






47. Design Randomization occurring within blocks






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






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






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