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






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






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






4. Holds information about the same characteristic for many cases






5. Sampling schemes that combine several sampling methods






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






7. The difference between the first and third quartiles






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






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






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






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






12. Control - randomize - replicate - block






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






14. Anything in a survey design that influences response






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






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






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






18. 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






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






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






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






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






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






24. A numerical measure of the direction and strength of a linear association






25. A variable whose levels are controlled by the experimenter






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






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






28. An individual about whom or which we have data






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






30. Displays the 5-number summary as a central box with whiskers that extend to the non-outlying data values






31. The linear equation y-hat = b0 + b1x that satisfies the least squares criterion






32. When doing this - consider their shape - center - and spread






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






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






35. Displays data that change over time






36. Each predicted y-hat tends to be fewer standard deviations from its mean than its corresponding x was from its mean






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






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






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






40. Ideally tells who was measured - what was measured - how the data were collected - where the data were collected - and when and why the study was performed






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






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






43. To describe this aspect of a distribution - look for single vs. multiple modes - and symmetry vs. skewness






44. The ____ we care about most is straight






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 sampling scheme that biases the sample in a way that gives a part of the population less representation than it has in the population






47. Tells how many standard deviations a value is from the mean; have a mean of zero and a standard deviation of one






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






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






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