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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. 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






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






3. Sample variance






4. Statistics






5. Parameter






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






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






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






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






10. Lowercase sigma; population standard deviaition






11. 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






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






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






14. Sample standard deviation






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






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






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






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






19. Probability of event A






20. 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






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






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






23. Test use normalcdf(ZTS -999)






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






25. Collection of information from a sample






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






27. One extreme value can affect it dramatically.






28. Sample proportion






29. Range - standard deviation and variance.






30. 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






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






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






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






34. A numerical quantity measuring some aspect of the population






35. 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






36. Sample size or number of trials






37. Represents categories - and is nonnumerical in nature






38. Members of the population select themselves by volunteering






39. Information about individuals in a population






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






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






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






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






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






45. Sum of the values






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






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






48. Involves the procedures associated with the data collection process - the summarizing and interpretation of data - and the drawing of inferences or conclusions based on the analysis of the data






49. 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






50. Collection of information from the whole population