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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. 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






2. Statistics






3. The number of times each data value occurs






4. 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






5. Members of the population select themselves by volunteering






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






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






8. 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






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






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






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






12. 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






13. Sample proportion






14. Double the answer from step 1 or step 2 (on whichever side your test statistics falls).






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






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






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






18. Sample mean






19. 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






20. 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






21. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies






22. One extreme value can affect it dramatically.






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






24. Sum of the values






25. An individual data value which lies far (above or below) from most or all of the other data values within a distribution






26. Lowercase sigma; population standard deviaition






27. Mean - mode - median and midrange.






28. Alternative hypothesis






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






30. 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






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






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






33. Collection of information from the whole population






34. Population proportion






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






36. 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






37. Complement of p






38. Standard scores and percentile






39. Always use a equal symbol






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






41. _______________ 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






42. 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






43. Test use normalcdf(ZTS -999)






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






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






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






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






48. Sample variance






49. 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






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