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






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






3. Members of the population select themselves by volunteering






4. The important aspects of the data are called?






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






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






7. The number of times each data value occurs






8. Sample variance






9. _______________ 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






10. One extreme value can affect it dramatically.






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






12. 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






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






14. 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






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






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






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






18. Is a sample containing similar characteristics of the population






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






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






21. Complement of p






22. Null hypothesis






23. Sample proportion






24. 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.






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






26. A method in which each combination of people has an equal chance of being selected- the sample is representative of the population and is independent






27. Information about individuals in a population






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






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






30. Sample mean






31. Test use normalcdf(ZTS -999)






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






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






34. Population proportion






35. 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).






36. Mean - mode - median and midrange.






37. Mu; population mean






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






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






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






41. Alternative hypothesis






42. Population size






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






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






45. Collection of information from a sample






46. Population variance






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






48. Probability of event A






49. Lowercase sigma; population standard deviaition






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

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