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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. Probability of event A






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






3. 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






4. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.






5. Information about individuals in a population






6. Population variance






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






8. Test use normalcdf(ZTS -999)






9. 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






10. Mu; population mean






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






12. Sample mean






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






14. Members of the population select themselves by volunteering






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






16. The number of times each data value occurs






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






18. Complement of p






19. Sample standard deviation






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






21. Collection of information from a sample






22. 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






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






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






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






26. Statistics






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






28. Alternative hypothesis






29. Type II error is measured






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






31. _______________ 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






32. Population proportion






33. Sample size or number of trials






34. Lowercase sigma; population standard deviaition






35. 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).






36. Range - standard deviation and variance.






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






38. 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






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


40. 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






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






42. Sample variance






43. Population size






44. Represents categories - and is nonnumerical in nature






45. Mean - mode - median and midrange.






46. 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






47. 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






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






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






50. Always use a equal symbol