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






2. Members of the population select themselves by volunteering






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






4. 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






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


6. Always use a equal symbol






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






8. Capital sigma; summation






9. 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






10. Sample proportion






11. Standard scores and percentile






12. Collection of information from a sample






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






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






15. Sample standard deviation






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






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






18. Range - standard deviation and variance.






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






20. Population size






21. 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






22. A visual exploratory data analysis technique that shows the shape of a distribution - this kind of display uses the actual values of the variable to present the shape of the distribution of data values






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






24. _______________ 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






25. Type of information - usually a property of characteristic of a person or thing that is measured or observed






26. Statistics






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






28. Mean - mode - median and midrange.






29. Type II error is measured






30. 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






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






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






33. A method of experimentation in which you can control as many variables as possible in order to isolate the effects of a response variable






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






35. Sample variance






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






37. Test use normalcdf(ZTS -999)






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






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






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






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






42. A numerical quantity measuring some aspect of the population






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






44. The number of times each data value occurs






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






46. 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






47. 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






48. Sample size or number of trials






49. Represents categories - and is nonnumerical in nature






50. Sample mean