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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 list of individuals from whom the sample is drawn






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

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






4. 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






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






6. A variable whose levels are controlled by the experimenter






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






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






9. 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






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






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






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






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






14. The difference between the first and third quartiles






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






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






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






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






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






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






21. A variable whose values are compared across different treatments






22. A numerically valued attribute of a model for a population






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






24. Useful family of models for unimodal - symmetric distributions






25. 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






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






27. The number of individuals in a sample






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






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






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






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






32. 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






33. Anything in a survey design that influences response






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






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






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






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






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






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






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






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






42. A distribution that's roughly flat






43. Summarized with the mean or the median






44. A value that attempts the impossible by summarizing the entire distribution with a single number - a 'typical' value






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






46. An individual result of a component of a simulation






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






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






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






50. 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