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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. Mean - mode - median and midrange.






2. A numerical quantity measuring some aspect of the population






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






4. Probability of event A






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






6. Range - standard deviation and variance.






7. Lowercase sigma; population standard deviaition






8. _______________ 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






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






10. Statistics






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






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






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

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14. Sum of the values






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






16. 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






17. Alternative hypothesis






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






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






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






21. Sample size or number of trials






22. Sample variance






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






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






25. Sample mean






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






27. Type of bar graph that shows frequency distributions






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






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






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






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






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






33. Standard scores and percentile






34. 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






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






36. 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






37. 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






38. 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






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






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






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






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






43. Sample proportion






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






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






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






47. 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






48. Null hypothesis






49. 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






50. Mu; population mean