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. The experimental units assigned to a baseline treatment level - typically either the default treatment - which is well understood - or a null - placebo treatment






2. Individuals on whom an experiment is performed






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






4. 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






5. When doing this - consider their shape - center - and spread






6. 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






7. An equation or formula that simplifies and represents reality






8. Consists of the individuals who are conveniently available






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






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






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






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






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






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






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






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






17. Sampling schemes that combine several sampling methods






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






19. Distributions with two modes






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






21. The differences between data values and the corresponding values predicted by the regression model; ____ = observed value - predicted value






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






23. Useful family of models for unimodal - symmetric distributions






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






25. 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






26. 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






27. 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






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






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






31. Any individual associated with an experiment who is not aware of how subjects have been allocated to treatment groups






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






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






34. 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






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






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






37. 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


38. Doing this is equivalent to changing its units






39. An individual about whom or which we have data






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






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






42. Models random events by using random numbers to specify event outcomes with relative frequencies that correspond to the true real-world relative frequencies we are trying to model






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






44. A distribution that's roughly flat






45. Holds information about the same characteristic for many cases






46. Adding a constant to each data value adds the same constant to the mean - the median - and the quartiles - but does not change the standard deviation or IQR






47. Summarized with the mean or the median






48. 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






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






50. Displays data that change over time