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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. 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






2. Test use normalcdf(ZTS -999)






3. 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






4. 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






5. Information about individuals in a population






6. 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






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






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






9. 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






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






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






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






13. 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






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






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






16. 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






17. 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






18. Represents categories - and is nonnumerical in nature






19. Statistics






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






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






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






23. Mu; population mean






24. The number of times each data value occurs






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






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

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27. Probability of event A






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






29. Alternative hypothesis






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






31. Parameter






32. Lowercase sigma; population standard deviaition






33. Mean - mode - median and midrange.






34. Sample mean






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






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






37. Sample variance






38. Members of the population select themselves by volunteering






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






40. Sample size or number of trials






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






42. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.






43. 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.






44. 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






45. Sample standard deviation






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






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






48. 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






49. 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






50. Sum of the values