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






2. Sum of the values






3. Parameter






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






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






6. Capital sigma; summation






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






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






9. Range - standard deviation and variance.






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






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






12. Represents categories - and is nonnumerical in nature






13. 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






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






15. Collection of information from the whole population






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






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






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






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






20. Probability of event A






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






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






23. 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).






24. Complement of p






25. 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






26. 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






27. Mean - mode - median and midrange.






28. The important aspects of the data are called?






29. Mu; population mean






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






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






32. Collection of information from a sample






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






34. Null hypothesis






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






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






37. 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






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






39. Population variance






40. Alternative hypothesis






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






42. _______________ 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






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






44. 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






45. Sample standard deviation






46. Lowercase sigma; population standard deviaition






47. 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






48. 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






49. The number of times each data value occurs






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

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