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






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






3. Range - standard deviation and variance.






4. Sample size or number of trials






5. Capital sigma; summation






6. Collection of information from a sample






7. 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






8. Population variance






9. A collection of individuals about which we want to draw conclusions






10. Null hypothesis






11. Standard scores and percentile






12. 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






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






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






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






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






17. Type of bar graph that shows frequency distributions






18. Sample proportion






19. 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






20. Parameter






21. 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






22. Test use normalcdf(ZTS -999)






23. _______________ 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






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






25. 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






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






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






28. A numerical quantity measuring some aspect of the population






29. Alternative hypothesis






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






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






32. Sample standard deviation






33. Mu; population mean






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






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






36. 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






37. One extreme value can affect it dramatically.






38. The number of times each data value occurs






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






40. Represents categories - and is nonnumerical in nature






41. 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






42. Sample mean






43. _______________ are numerical measurements that can assume any value between two numbers






44. Population proportion






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






46. Sum of the values






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






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






49. Probability of event A






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