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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. _______________ 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






2. A numerical quantity measuring some aspect of the population






3. 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






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






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






6. 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






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






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






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






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






11. 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






12. Lowercase sigma; population standard deviaition






13. 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






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






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






16. Sample variance






17. 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






18. Sample standard deviation






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






20. 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






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






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






24. 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






25. Standard scores and percentile






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






27. Mu; population mean






28. Information about individuals in a population






29. Mean - mode - median and midrange.






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






31. Parameter






32. Statistics






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






34. 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






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. Type II error is measured






37. Population variance






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






39. Probability of event A






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






41. Alternative hypothesis






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






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






44. Population size






45. Sample size or number of trials






46. Null hypothesis






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

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






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






50. Is a sample containing similar characteristics of the population