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AP Statistics Vocab

Subjects : statistics, ap
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. Summarized with the mean or the median






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






3. In a retrospective or prospective study Subjects who are similar in ways not under study may be ____ and then compared with each other on the variables of interest






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






5. Gives a value in 'y-units per x-unit'; changes of one unit in x are associated with changes of b1 units in predicted values of y






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






7. An individual about whom or which we have data






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






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






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






11. A distribution that's roughly flat






12. 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






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






14. Anything in a survey design that influences response






15. The natural tendency of randomly drawn samples to differ






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






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






18. A variable whose values are compared across different treatments






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






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






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






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






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






24. Numerically valued attribute of a model






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






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






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






28. Values of this record the results of each trial with respect to what we were interested in






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






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






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






32. A numerically valued attribute of a model for a population






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






34. 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






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






36. Bias introduced to a sample when individuals can choose on their own whether to participate in the sample






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






38. A variable whose levels are controlled by the experimenter






39. Design Randomization occurring within blocks






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

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






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






43. Useful family of models for unimodal - symmetric distributions






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






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






46. The square root of the variance






47. Holds information about the same characteristic for many cases






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






49. Distributions with two modes






50. 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







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