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






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






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






4. One extreme value can affect it dramatically.






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






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

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






8. 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






9. The important aspects of the data are called?






10. Sample size or number of trials






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






12. Statistics






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






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






15. 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






16. 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






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






18. Information about individuals in a population






19. Test use normalcdf(ZTS -999)






20. 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






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






22. 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






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






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






25. Mu; population mean






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






27. Sample standard deviation






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






29. Null hypothesis






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






31. _______________ 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






32. Probability of event A






33. 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






34. Standard scores and percentile






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






36. Collection of information from a sample






37. Range - standard deviation and variance.






38. Complement of p






39. Population size






40. 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






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






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






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






44. Represents categories - and is nonnumerical in nature






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






46. Mean - mode - median and midrange.






47. Lowercase sigma; population standard deviaition






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






49. 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






50. 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