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






2. 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






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






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






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






6. Design Randomization occurring within blocks






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






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






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






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






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






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






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






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






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






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






17. The natural tendency of randomly drawn samples to differ






18. An arrangement of data in which each row represents a case and each column represents a variable






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






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






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






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






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






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






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






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






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






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






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






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






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






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






33. The number of individuals in a sample






34. A variable whose values are compared across different treatments






35. 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






36. A variable whose levels are controlled by the experimenter






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






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






39. The difference between the first and third quartiles






40. Summarized with the mean or the median






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






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






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






44. 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






45. Numerically valued attribute of a model






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






47. An equation or formula that simplifies and represents reality






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






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






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