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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. 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






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






3. Collection of information from a sample






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

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5. Collection of information from the whole population






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






7. Always use a equal symbol






8. Sample size or number of trials






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






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






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






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






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






14. Sample mean






15. A numerical quantity measuring some aspect of the population






16. Alternative hypothesis






17. Mu; population mean






18. 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






19. Is a sample containing similar characteristics of the population






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






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






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






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






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






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






26. Mean - mode - median and midrange.






27. Range - standard deviation and variance.






28. 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






29. Test use normalcdf(ZTS -999)






30. Lowercase sigma; population standard deviaition






31. Is a sample of data values selected from a population in such a way that every sample of size 'n' has an equal probability of being selected and every data value of the population has the same chance of being selected for the sample






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






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






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






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






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






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






38. Complement of p






39. One extreme value can affect it dramatically.






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






41. Sample proportion






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






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






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






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. The important aspects of the data are called?






47. 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






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






49. Population variance






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