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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. Is a number that describes a characteristic of a population






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






3. Statistics






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






5. 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






6. 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






7. Sample size or number of trials






8. Alternative hypothesis






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






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






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






12. Represents categories - and is nonnumerical in nature






13. Sample proportion






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






15. A collection of individuals about which we want to draw conclusions






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






17. 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






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






19. A numerical quantity measuring some aspect of the population






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






21. Sample standard deviation






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






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






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






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






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






27. The important aspects of the data are called?






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






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






30. Is a sample containing similar characteristics of the population






31. The number of times each data value occurs






32. 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






33. Capital sigma; summation






34. Mu; population mean






35. 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






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

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37. Population proportion






38. Collection of information from the whole population






39. Test use normalcdf(ZTS -999)






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






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






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






43. 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






44. Information about individuals in a population






45. 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






46. Population size






47. 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.






48. Mean - mode - median and midrange.






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






50. Members of the population select themselves by volunteering







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Can you answer 50 questions in 15 minutes?


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