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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. The specific values that the experimenter chooses for a factor






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






3. The sequence of several components representing events that we are pretending will take place






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






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






6. Although linear models provide an easy way to predict values of y for a given value of x - it is unsafe to predict for values of x far from the ones used to find the linear model equation; predictions should not be trusted






7. In a retrospective or prospective study Subjects who are similar in ways not under study may be ____ and then compared with each other on the variables of interest






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






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






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






11. A normal model with a mean of 0 and a standard deviation of 1






12. Design Randomization occurring within blocks






13. The square of the correlation between y and x; gives the fraction of the variability of y accounted for by the least squares linear regression on x; an overall measure of how successful the regression is in linearly relating y to x






14. Shows the relationship between two quantitative variables measured on the same cases






15. The number of individuals in a sample






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






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






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






19. Holds information about the same characteristic for many cases






20. Sampling schemes that combine several sampling methods






21. Doing this is equivalent to changing its units






22. The difference between the first and third quartiles






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






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






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






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






27. A positive ____ or association means that - in general - as one variable increases - so does the other; when increases in one variable generally correspond to decreases in the other - the association is negative






28. The natural tendency of randomly drawn samples to differ






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






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






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






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






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






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






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






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






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






38. 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






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






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






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






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






43. If data consist of two or more groups that have been thrown together - it is usually best to fit different linear models to each group than to try to fit a single model to all of the data






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






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






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






47. Control - randomize - replicate - block






48. Systematically recorded information - whether numbers or labels - together with its context






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






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






Can you answer 50 questions in 15 minutes?



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