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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. 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.






2. 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






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






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






5. Test use normalcdf(ZTS -999)






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






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






8. Represents categories - and is nonnumerical in nature






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






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






11. Null hypothesis






12. Standard scores and percentile






13. The number of times each data value occurs






14. 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






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






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






17. Mean - mode - median and midrange.






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






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






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






22. 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






23. Sample standard deviation






24. Is a sample containing similar characteristics of the population






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

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






27. Sample mean






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






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






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






31. Collection of information from a sample






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






33. 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






34. The important aspects of the data are called?






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






36. 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






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






38. Lowercase sigma; population standard deviaition






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






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 you randomly choose one number from 'l' to 'k' and continue to select the kth element






42. Probability of event A






43. Members of the population select themselves by volunteering






44. Parameter






45. 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






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






47. One extreme value can affect it dramatically.






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






49. Sum of the values






50. 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