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






2. 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






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






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






5. Sample standard deviation






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






7. Alternative hypothesis






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






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






10. 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






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






12. 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






13. One extreme value can affect it dramatically.






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






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






16. _______________ 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






17. Mean - mode - median and midrange.






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






19. Complement of p






20. 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






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






22. Members of the population select themselves by volunteering






23. Test use normalcdf(ZTS -999)






24. Mu; population mean






25. Represents categories - and is nonnumerical in nature






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






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






28. Determine the location of the middle value of all the data values






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






30. Collection of information from the whole population






31. 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






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






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






34. Type of bar graph that shows frequency distributions






35. Always use a equal symbol






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






37. Population proportion






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






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






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






41. 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






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






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






44. Collection of information from a sample






45. 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.






46. Range - standard deviation and variance.






47. Sample variance






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






49. Lowercase sigma; population standard deviaition






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







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