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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. (largest data value) - (smallest data value)






2. Members of the population select themselves by volunteering






3. Collection of information from the whole population






4. Mu; population mean






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






6. Is the entire collection of all individuals or objects of interest






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






8. Population variance






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






10. A survey that includes every item or individual of the population






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






12. One extreme value can affect it dramatically.






13. Represents categories - and is nonnumerical in nature






14. Statistics






15. Alternative hypothesis






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






17. Lowercase sigma; population standard deviaition






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






19. 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






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

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21. Capital sigma; summation






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






23. Parameter






24. Population is organized into groups (i.e - neighborhoods/departments) - and sampling unit is selected by a simple random sample






25. 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






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






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






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






29. Population proportion






30. 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






31. Collection of information from a sample






32. Sample standard deviation






33. Middle value of a set of data values after they've been arranged in numerical order - 1. First arrange data values in numerical order 2. For odd # of data values - the median is the middle data value 3. For even # of data values - the median is the m






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






35. A subset of the population- it's important to choose a sample at random to avoid bias in the results






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






37. Sample size or number of trials






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






39. An individual data value which lies far (above or below) from most or all of the other data values within a distribution






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






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






42. A numerical quantity measuring some aspect of the population






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






44. Is denoted by 'n' - is the number of data values in the sample






45. Is a collection of several data pertaining to one or more variables






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






47. Is denoted by 'N' - is the number of data values in the population






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






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






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