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






3. 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






4. Sample variance






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






6. Sample size or number of trials






7. Collection of information from a sample






8. Alternative hypothesis






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






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






11. 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






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






13. Standard scores and percentile






14. A descriptive tool used to visually describe the characteristics and relationships of collections of data quickly and attractively






15. Range - standard deviation and variance.






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






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






18. Mean - mode - median and midrange.






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






20. Null hypothesis






21. Sample mean






22. Members of the population select themselves by volunteering






23. One extreme value can affect it dramatically.






24. Collection of information from the whole population






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






26. Information about individuals in a population






27. 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






28. Population variance






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. 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).






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






32. The important aspects of the data are called?






33. 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






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






35. Statistics






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






37. 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






38. A numerical quantity measuring some aspect of the population






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






40. _______________ 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






41. 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.






42. Type of bar graph that shows frequency distributions






43. 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






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






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

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46. Population size






47. Sample proportion






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






49. Mu; population mean






50. Probability of event A






Can you answer 50 questions in 15 minutes?



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