Test your basic knowledge |

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. Control - randomize - replicate - block






2. 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






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






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






5. Summarized with the mean or the median






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






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






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






9. 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






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






11. A sample that consists of the entire population






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






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






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






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






16. Distributions with two modes






17. An individual about whom or which we have data






18. Data points whose x-values are far from the mean of x are said to exert ____ on a linear model; with high enough ____ - residuals can appear to be deceptively small






19. Anything in a survey design that influences response






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






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






22. A variable whose values are compared across different treatments






23. 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






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






25. 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






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






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






28. 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






29. Bias introduced to a sample when a large fraction of those sampled fails to respond






30. The ____ we care about most is straight






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






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






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






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






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






36. 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






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






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






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






40. Displays data that change over time






41. 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






42. A treatment known to have no effect - administered so that all groups experience the same conditions






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






44. 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






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






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






48. 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






49. Holds information about the same characteristic for many cases






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