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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. Population proportion






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






3. _______________ 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






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






5. Sample variance






6. Sample mean






7. 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.






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






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






10. Population variance






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






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






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






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






15. A numerical quantity measuring some aspect of the population






16. Standard scores and percentile






17. 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






18. A quantity calculated from data gathered from a sample- usually used to estimate a population parameter






19. Mean - mode - median and midrange.






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






21. Before they are arranged or analyzed - information or observations are called________.






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






23. Capital sigma; summation






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






25. Is a sample containing similar characteristics of the population






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






27. 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






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






29. One extreme value can affect it dramatically.






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






31. Always use a equal symbol






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






33. 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






34. 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






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






36. The number of times each data value occurs






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






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






39. Type of bar graph that shows frequency distributions






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






41. Complement of p






42. Alternative hypothesis






43. Probability of event A






44. Type II error is measured






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






46. Test use normalcdf(ZTS -999)






47. 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






48. 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






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






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