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






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






3. The important aspects of the data are called?






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






5. 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






6. A flaw in the sampling procedure that makes it more likely that the sample will NOT be representative of population






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






8. 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).






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






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






11. Members of the population select themselves by volunteering






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






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






14. Collection of information from the whole population






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






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






17. Sum of the values






18. Null hypothesis






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






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






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






22. Alternative hypothesis






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






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






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






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






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






28. Information about individuals in a population






29. 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






30. Collection of information from a sample






31. Population size






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






33. Sample standard deviation






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






35. 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






36. Mu; population mean






37. Sample size or number of trials






38. Represents categories - and is nonnumerical in nature






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






40. Always use a equal symbol






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






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






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






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






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






46. Sample mean






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






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






49. A numerical quantity measuring some aspect of the population






50. 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