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






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






3. 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






4. 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






5. When either those who could influence or evaluate the results is blinded






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






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






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






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






10. 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






11. 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


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






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






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






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






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






17. 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






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






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






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






21. Sampling schemes that combine several sampling methods






22. The process - intervention - or other controlled circumstance applied to randomly assigned experimental units






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






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






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






26. This criterion specifies the unique line that minimizes the variance of the residuals or - equivalently - the sum of the squared residuals






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






28. 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






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






30. Numerically valued attribute of a model






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






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






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






34. Useful family of models for unimodal - symmetric distributions






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






36. The distribution of a variable restricting the who to consider only a smaller group of individuals






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






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






39. Summarized with the mean or the median






40. An equation or formula that simplifies and represents reality






41. 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






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






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






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






45. The natural tendency of randomly drawn samples to differ






46. The number of individuals in a sample






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






48. 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






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






50. Value found by subtracting the mean and dividing by the standard deviation