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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. 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






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






3. Always use a equal symbol






4. Population size






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






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






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






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






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






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






11. Capital sigma; summation






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






13. 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






14. Population variance






15. Sample proportion






16. 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






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






18. Parameter






19. A flaw in the sampling procedure that makes it more likely that the sample will NOT be representative of population






20. Sum of the values






21. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).






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






23. 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






24. Information about individuals in a population






25. Using graphs and numerical summaries to describe variables in a data set and their relationship






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






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






28. 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






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






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






31. Lowercase sigma; population standard deviaition






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






33. Type II error is measured






34. Standard scores and percentile






35. Members of the population select themselves by volunteering






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






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






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






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






40. Mean - mode - median and midrange.






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






42. Mu; population mean






43. Collection of information from a sample






44. 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






45. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.






46. Complement of p






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






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






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






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