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






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






3. The natural tendency of randomly drawn samples to differ






4. 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






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






6. A variable other than x and y that simultaneously affects both variables - accounting for the correlation between the two






7. Sampling schemes that combine several sampling methods






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






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






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






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






12. The square root of the variance






13. Consists of the individuals who are conveniently available






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






15. The ____ we care about most is straight






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






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






18. Individuals on whom an experiment is performed






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






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






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






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






23. Anything in a survey design that influences response






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






25. When an observed difference is too large for us to believe that is is likely to have occurred naturally






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






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






28. Distributions with more than two modes






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






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






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






32. Distributions with two modes






33. Displays counts and - sometimes - percentages of individuals falling into named categories on two or more variables; categorizes the individuals on all variables at once - to reveal possible patterns in one variable that may be contingent on the cate






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






35. 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






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






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






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






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






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






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






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






43. An equation or formula that simplifies and represents reality






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






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






46. A distribution that's roughly flat






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






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






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






50. Manipulates factor levels to create treatments - randomly assigns subjects to these treatment levels - and then compares the responses of the subject groups across treatment levels