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. 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






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






3. Displays data that change over time






4. A point that does not fit the overall pattern seen in the scatterplot






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






6. 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






7. Distributions with two modes






8. Numerically valued attribute of a model






9. Sampling schemes that combine several sampling methods






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






11. The square of the correlation between y and x; gives the fraction of the variability of y accounted for by the least squares linear regression on x; an overall measure of how successful the regression is in linearly relating y to x






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






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






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






15. A variable whose values are compared across different treatments






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






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






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






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






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






21. 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






22. When an observed difference is too large for us to believe that is is likely to have occurred naturally






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






24. Consists of the individuals who are conveniently available






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






26. A scatterplot shows an association that is this if there is little scatter around the underlying relationship






27. 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






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






29. Individuals on whom an experiment is performed






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






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






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






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






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






35. The square root of the variance






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






37. Tells how many standard deviations a value is from the mean; have a mean of zero and a standard deviation of one






38. 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


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






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






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






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






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






44. A distribution that's roughly flat






45. Holds information about the same characteristic for many cases






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






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






48. The number of individuals in a sample






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






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