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






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






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






4. The ____ we care about most is straight






5. A sample that consists of the entire population






6. These are hard to generate - but several websites offer an unlimited supply of equally likely random values






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






8. Distributions with two modes






9. 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






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






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






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






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






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






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






16. We do this by taking the logarithm - the square root - the reciprocal - or some other mathematical operation on all values in the data set






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






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






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






20. Variables are said to be this if the conditional distribution of one variable is the same for each category of the other






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






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






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






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






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






26. 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






27. Summarized with the standard deviation - interquartile range - and range






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






29. A sampling design in which entire groups are chosen at random






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






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






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






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






34. To be valid - an experiment must assign experimental units to treatment groups at random






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






36. Bias introduced to a sample when individuals can choose on their own whether to participate in the sample






37. 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






38. Design Randomization occurring within blocks






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






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






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






42. Anything in a survey design that influences response






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






44. 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






45. Gives a value in 'y-units per x-unit'; changes of one unit in x are associated with changes of b1 units in predicted values of y






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






47. Control - randomize - replicate - block






48. 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






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






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







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