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






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






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






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






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






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


8. All experimental units have an equal chance of receiving any treatment






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






10. The square root of the variance






11. Displays counts and - sometimes - percentages of individuals falling into named categories on two or more variables; categorizes the individuals on all variables at once - to reveal possible patterns in one variable that may be contingent on the cate






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






13. 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






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






15. 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






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






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






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






19. Shows how a 'whole' divides into categories by showing a wedge of a circle whose area corresponds to the proportion in each category






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






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






22. The natural tendency of randomly drawn samples to differ






23. Control - randomize - replicate - block






24. Distributions with two modes






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






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






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






28. Numerically valued attribute of a model






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






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






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






32. An individual result of a component of a simulation






33. 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






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






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






36. 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






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






38. The difference between the first and third quartiles






39. Doing this is equivalent to changing its units






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






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






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






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






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






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






46. 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






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






48. Displays data that change over time






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






50. 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