Test your basic knowledge |

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. 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






2. Sum of the values






3. Probability of event A






4. Sample standard deviation






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






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






7. _______________ 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






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






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






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






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






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






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






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






15. Mean - mode - median and midrange.






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






17. Sample proportion






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






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






20. 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.






21. 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






22. Parameter






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






24. 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






25. The number of times each data value occurs






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






27. Standard scores and percentile






28. 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






29. Test use normalcdf(ZTS -999)






30. Null hypothesis






31. 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






32. Capital sigma; summation






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






34. Collection of information from the whole population






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






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






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






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






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






40. Range - standard deviation and variance.






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






42. Information about individuals in a population






43. Sample size or number of trials






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






45. Alternative hypothesis






46. 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






47. Always use a equal symbol






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






49. 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






50. One extreme value can affect it dramatically.