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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. 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






2. Sample standard deviation






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






4. One extreme value can affect it dramatically.






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






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






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






8. 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






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






10. A survey that includes every item or individual of the 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. A subset of the population- it's important to choose a sample at random to avoid bias in the results






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






14. Collection of information from the whole population






15. The important aspects of the data are called?






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






17. Lowercase sigma; population standard deviaition






18. 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






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






20. Statistics






21. Mu; population mean






22. Sample variance






23. Sample size or number of trials






24. 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).






25. Standard scores and percentile






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






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






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






29. Capital sigma; summation






30. Represents categories - and is nonnumerical in nature






31. 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






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






33. Test use normalcdf(ZTS -999)






34. 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






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






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






37. Range - standard deviation and variance.






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






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






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






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






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






43. Parameter






44. Collection of information from a sample






45. The variable value can be represented as isolated points on a number line






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






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






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

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






50. Mean - mode - median and midrange.







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