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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. Represents categories - and is nonnumerical in nature






2. Probability of event A






3. One extreme value can affect it dramatically.






4. 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






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






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






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






8. Parameter






9. Population variance






10. 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).






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






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






13. Population size






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






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






16. 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






17. Null hypothesis






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






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






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






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






22. Information about individuals in a population






23. 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






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






25. Members of the population select themselves by volunteering






26. Population is organized into groups (i.e - neighborhoods/departments) - and sampling unit is selected by a simple random sample






27. 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.






28. Sample standard deviation






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






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






31. Lowercase sigma; population standard deviaition






32. Range - standard deviation and variance.






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






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






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






36. Complement of p






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






38. Mu; population mean






39. 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






40. 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






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






42. 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






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






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






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






46. Type II error is measured






47. Population proportion






48. 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






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






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







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