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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. Sample size or number of trials






2. Standard scores and percentile






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






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






5. Sample proportion






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






7. Population size






8. Type of bar graph that shows frequency distributions






9. Represents categories - and is nonnumerical in nature






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






11. Range - standard deviation and variance.






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






13. Sample mean






14. Population variance






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






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






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

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






19. 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






20. 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






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






22. _______________ 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






23. Test use normalcdf(ZTS -999)






24. Collection of information from a sample






25. 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.






26. Sum of the values






27. 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






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






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






30. 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






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






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






33. 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






34. Population proportion






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






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






37. Type II error is measured






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






39. One extreme value can affect it dramatically.






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






41. Information about individuals in a population






42. Null hypothesis






43. The number of times each data value occurs






44. A numerical quantity measuring some aspect of the population






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






46. Mean - mode - median and midrange.






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






48. The pattern of variation of data. The distribution may be described as symmetrical - positively skewed - or negatively skewed






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






50. Capital sigma; summation







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Can you answer 50 questions in 15 minutes?


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