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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. 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






2. Null hypothesis






3. Probability of event A






4. Statistics






5. _______________ 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






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






7. Standard scores and percentile






8. A numerical quantity measuring some aspect of the population






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






10. Represents categories - and is nonnumerical in nature






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






12. 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






13. Sample size or number of trials






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






15. Parameter






16. Sample mean






17. 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






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






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






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






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






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






23. 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






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






25. Population proportion






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






27. Graph involving pictures of objects in which the size of the object in which the size of the object in the picture represents the relative size of the quantity being represented by the object.






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






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






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






31. Test use normalcdf(ZTS -999)






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






33. Range - standard deviation and variance.






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






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






36. Complement of p






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






38. 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






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






40. Collection of information from the whole population






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






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






43. Lowercase sigma; population standard deviaition






44. Sample variance






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






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






47. One extreme value can affect it dramatically.






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






50. Collection of information from a sample