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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. Statistics






2. Capital sigma; summation






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






4. The important aspects of the data are called?






5. Sum of the values






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






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






8. A numerical quantity measuring some aspect of the population






9. Level of measurement- involves data that consist of names - labels and categories only. The data cannot be arranged in an ordering scheme (such as low to high). (Example) Nationalities of survey respondents






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






11. To find the range subtract the lowest value by the highest value.






12. Complement of p






13. Mu; population mean






14. 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






15. Collection of information from the whole population






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. Probability of event A






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






19. Standard scores and percentile






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






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






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






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

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24. Always use a equal symbol






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. Members of the population select themselves by volunteering






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






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






30. Is a sample containing similar characteristics of the population






31. Level of measurement- Is the interval level modified to include the inherent zero starting point (where zero indicates that none of the quantity is present). For values at this level - differences and ratios are both meaningful. (Example) Ages of sur






32. 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






33. Variable where the value is a number that results from a measurement process - also called numerical data






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






35. Type of bar graph that shows frequency distributions






36. Sample size or number of trials






37. Population size






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






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






40. Alternative hypothesis






41. Information about individuals in a population






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






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






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






45. Test use normalcdf(ZTS -999)






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






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






48. Is a sample of data values selected from a population in such a way that every sample of size 'n' has an equal probability of being selected and every data value of the population has the same chance of being selected for the sample






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






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