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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. Lowercase sigma; population standard deviaition






2. Statistics






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






4. The number of times each data value occurs






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






6. Is a sample containing similar characteristics of the population






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






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






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






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






11. Probability of event A






12. Population proportion






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






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






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






16. Double the answer from step 1 or step 2 (on whichever side your test statistics falls).






17. 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.






18. 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






19. 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






20. Type of bar graph that shows frequency distributions






21. 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






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






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






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






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






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






27. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.






28. Sample proportion






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






30. The important aspects of the data are called?






31. Parameter






32. Information about individuals in a population






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






34. Sample mean






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






36. Null hypothesis






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






38. Members of the population select themselves by volunteering






39. A numerical quantity measuring some aspect of the population






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






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






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






43. Population size






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






45. Test use normalcdf(ZTS -999)






46. Standard scores and percentile






47. Sample standard deviation






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






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






50. Mu; population mean