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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. Test use normalcdf(ZTS -999)






2. 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.






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






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






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






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






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






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






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






10. Collection of information from a sample






11. 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






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






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






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






15. Population size






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






17. One extreme value can affect it dramatically.






18. Complement of p






19. Mean - mode - median and midrange.






20. Statistics






21. 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






22. A numerical quantity measuring some aspect of the population






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






24. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.






25. Represents categories - and is nonnumerical in nature






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






27. Is a sample containing similar characteristics of the population






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






29. Members of the population select themselves by volunteering






30. 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






31. Sample variance






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






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






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






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






36. Information about individuals in a population






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






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






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






40. 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






41. 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






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






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






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






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






46. The number of times each data value occurs






47. Sum of the values






48. Sample mean






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






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