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. 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






2. Any systematic failure of a sampling method to represent its population; common errors are voluntary response - undercoverage - nonresponse ____ - and response ____






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






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






5. An individual about whom or which we have data






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






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






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






9. 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


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






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






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






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






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






15. The tendency of many human subjects (often 20% or more of experiment subjects) to show a response even when administered a placebo






16. 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






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






18. 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






19. 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






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






21. The natural tendency of randomly drawn samples to differ






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






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






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






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






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






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






28. Value calculated from data to summarize aspects of the data






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






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






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






32. The most basic situation in a simulation in which something happens at random






33. The ____ we care about most is straight






34. 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






35. A distribution is this if it's not symmetric and one tail stretches out farther than the other






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






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






38. 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






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






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






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






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






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






44. This corresponding to a z-score gives the percentage of values in a standard normal distribution found at that z-score or below






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






46. Consists of the individuals who are conveniently available






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






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. 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






50. Displays the 5-number summary as a central box with whiskers that extend to the non-outlying data values