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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 sample containing similar characteristics of the population






2. 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






3. Capital sigma; summation






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






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






6. Lowercase sigma; population standard deviaition






7. Test use normalcdf(ZTS -999)






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






9. Population size






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






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






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






13. Sum of the values






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






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






16. 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






17. 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






18. Sample proportion






19. Mu; population mean






20. Always use a equal symbol






21. Standard scores and percentile






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






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






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






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






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






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






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






29. Population proportion






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






32. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






33. Type II error is measured






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

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35. Sample standard deviation






36. Sample variance






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






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






39. Range - standard deviation and variance.






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






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






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






43. The important aspects of the data are called?






44. Information about individuals in a population






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






46. Members of the population select themselves by volunteering






47. Represents categories - and is nonnumerical in nature






48. 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






49. Sample size or number of trials






50. _______________ 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