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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 numerically valued attribute of a model for a population






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






3. 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






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






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






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






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






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






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






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






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






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






13. Summarized with the mean or the median






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






15. 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






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






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






18. In a normal model - about 68% of values fall within 1 standard deviation of the mean - about 95% fall within 2 standard deviations of the mean - and about 99.7% fall within 3 standard deviations of the mean






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






20. 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






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






22. An equation or formula that simplifies and represents reality






23. Sampling schemes that combine several sampling methods






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






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






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






27. Displays data that change over time






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






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






30. Useful family of models for unimodal - symmetric distributions






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






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






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






34. Anything in a survey design that influences response






35. Control - randomize - replicate - block






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






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






38. An observational study in which subjects are followed to observe future outcomes






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






40. 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






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






42. A display to help assess whether a distribution of data is approximately normal; if it is nearly straight - the data satisfy the nearly normal condition






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






44. 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






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






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. Distributions with two modes






48. The lower of this is the value with a quarter of the data below it; the upper of this has a quarter of the data above it






49. Any individual associated with an experiment who is not aware of how subjects have been allocated to treatment groups






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







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