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DSST Intro To Statistics

Subjects : dsst, statistics
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. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION






2. A quantity calculated from data gathered from a sample- usually used to estimate a population parameter






3. A method in which you randomly choose one number from 'l' to 'k' and continue to select the kth element






4. When the distribution of the data values greater than the center of the display - and the data values less than the center of the display are mirror images of each other






5. Capital sigma; summation






6. A flaw in the sampling procedure that makes it more likely that the sample will NOT be representative of population






7. Collection of information from a sample






8. _______________ are numerical values that can assume only a limited number of values






9. Type of bar graph that shows frequency distributions






10. Members of the population select themselves by volunteering






11. Involves the procedures associated with the data collection process - the summarizing and interpretation of data - and the drawing of inferences or conclusions based on the analysis of the data






12. To divide the population into 2 or more non-overlapping subsets called strata






13. When the distribution of the data values tend to be concentrated toward one end of the display or tail of the distribution - while the data values in the other tail are spread out through extreme values resulting in a longer tail






14. Population proportion






15. The important aspects of the data are called?






16. _______________ of a numerical variable represents the data values of the variable from the lowest to the highest value along with the number of times each data value occurs






17. Is a number that describes a characteristic of a population






18. Lowercase sigma; population standard deviaition






19. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.






20. Probability of event A






21. Sample standard deviation






22. One extreme value can affect it dramatically.






23. A collection of individuals about which we want to draw conclusions






24. Statistics






25. Population variance






26. Sample size or number of trials






27. Is a sample that has the pertinent characteristics of the population in the same proportion - as they are included in that population






28. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.






29. Double the answer from step 1 or step 2 (on whichever side your test statistics falls).






30. Mu; population mean






31. Can be used to get an initial graphical view of data






32. A descriptive tool used to visually describe the characteristics and relationships of collections of data quickly and attractively






33. Level of measurement- Involves data that may be arranged in some order - but differences between data values either cannot be determined or are meaningless. (Example) Questions on a survey are scored with integers 1 thru 5 with 1 representing strong






34. Test use normalcdf(ZTS -999)






35. Sample proportion






36. Sample variance






37. Square the standard deviation and to find the population variance square of the population standard deviation






38. Is a number that describes a characteristic of a sample

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39. _______________ are numerical measurements that can assume any value between two numbers






40. Occur when one does not affect the probability of the occurrence of the other.






41. Standard scores and percentile






42. Uses numerical and or visual techniques to summarize or describe the data in a clear effective manner






43. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






44. A method of data collection where the researcher selects a sample from the population and measures the variable of interest






45. Before they are arranged or analyzed - information or observations are called________.






46. Mean - mode - median and midrange.






47. Disjoint events cannot overlap. They are mutually exclusive if they cannot occur at the same time.






48. The pattern of variation of data. The distribution may be described as symmetrical - positively skewed - or negatively skewed






49. Sum of the values






50. For a left tailed test use normalcdf(-999 - ZTS)







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Can you answer 50 questions in 15 minutes?


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