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






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






3. Collection of information from the whole population






4. Always use a equal symbol






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






6. 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






7. Mean - mode - median and midrange.






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






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






10. Parameter






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






12. Is a sample containing similar characteristics of the population






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






14. Information about individuals in a population






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






16. Test use normalcdf(ZTS -999)






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






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






19. Sample proportion






20. Sample mean






21. A numerical quantity measuring some aspect of the population






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






23. Middle value of a set of data values after they've been arranged in numerical order - 1. First arrange data values in numerical order 2. For odd # of data values - the median is the middle data value 3. For even # of data values - the median is the m






24. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).






25. Standard scores and percentile






26. Sample variance






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






28. Null hypothesis






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






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






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






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






33. One extreme value can affect it dramatically.






34. 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.






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






36. Sample size or number of trials






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






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






39. _______________ 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






40. The number of times each data value occurs






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






42. Members of the population select themselves by volunteering






43. Sum of the values






44. Probability of event A






45. Population size






46. Alternative hypothesis






47. Sample standard deviation






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






49. Range - standard deviation and variance.






50. Collection of information from a sample