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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. Create a sample by using data from population members that are readily available






2. Is a sample containing similar characteristics of the population






3. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies






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






5. Statistics






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






7. Population size






8. Sample proportion






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






10. Probability of event A






11. Sample size or number of trials






12. Sample mean






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






14. Lowercase sigma; population standard deviaition






15. Population proportion






16. Collection of information from the whole population






17. A method of data collection in which the objects of study are observed in their natural settings and the variables are recorded






18. A sample which is selected in such a manner - that each data value of the population has a non-zero probability of being selected for the sample






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






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






21. Is the portion of the population that is selected for study






22. Determine the location of the middle value of all the data values






23. Mu; population mean






24. Is the process of selecting a portion - or sample - of the entire population






25. Type of bar graph that shows frequency distributions






26. Mean - mode - median and midrange.






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






28. Null hypothesis






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






30. Occur when one of them affects the probability of the other.






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

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32. Sample variance






33. The variable value can be represented as isolated points on a number line






34. The important aspects of the data are called?






35. Always use a equal symbol






36. Capital sigma; summation






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






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






39. Complement of p






40. Population variance






41. Sum of the values






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






43. 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






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






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






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






47. Alternative hypothesis






48. Parameter






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






50. Standard scores and percentile