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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. 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.






2. 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






3. Parameter






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






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






6. 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






7. Sample size or number of trials






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






9. The important aspects of the data are called?






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






11. Mean - mode - median and midrange.






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






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






14. Probability of event A






15. Information about individuals in a population






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






17. Capital sigma; summation






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






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






20. 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






21. Standard scores and percentile






22. 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






23. 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






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






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






26. Mu; population mean






27. Statistics






28. One extreme value can affect it dramatically.






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






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


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






32. 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






33. Population variance






34. Members of the population select themselves by volunteering






35. Sum of the values






36. Collection of information from a sample






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






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






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






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






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






42. Null hypothesis






43. Population size






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






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






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






47. _______________ 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






48. Alternative hypothesis






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






50. Is a sample containing similar characteristics of the population