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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. Lowercase sigma; population standard deviaition






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






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






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






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






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






7. Statistics






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






9. 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






10. A numerical quantity measuring some aspect of the population






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






12. 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






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






14. Mean - mode - median and midrange.






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






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






17. Null hypothesis






18. Standard scores and percentile






19. Probability of event A






20. 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






21. Alternative hypothesis






22. Population variance






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






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






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






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






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






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






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






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






31. Collection of information from a sample






32. 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






33. Sample proportion






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






35. Mu; population mean






36. Always use a equal symbol






37. Members of the population select themselves by volunteering






38. Sum of the values






39. 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






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






41. A method in which each combination of people has an equal chance of being selected- the sample is representative of the population and is independent






42. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION






43. Type of bar graph that shows frequency distributions






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






45. Parameter






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






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






48. Represents categories - and is nonnumerical in nature






49. Test use normalcdf(ZTS -999)






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