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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. Parameter






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






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






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






5. 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






6. Members of the population select themselves by volunteering






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






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






9. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc






10. Collection of information from a sample






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






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. Sample proportion






14. 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






15. Type of bar graph that shows frequency distributions






16. Sample variance






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






18. 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






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






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

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21. 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






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






23. A numerical quantity measuring some aspect of the population






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






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






26. The number of times each data value occurs






27. Population size






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






29. 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






30. Lowercase sigma; population standard deviaition






31. Information about individuals in a population






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






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






34. One extreme value can affect it dramatically.






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






36. 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






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






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






39. 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






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






41. Standard scores and percentile






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






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






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






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






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






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






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






49. Represents categories - and is nonnumerical in nature






50. Population proportion







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Can you answer 50 questions in 15 minutes?


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