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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 survey that includes every item or individual of the population






2. 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






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






4. Always use a equal symbol






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






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






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






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






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






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






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






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






13. Population proportion






14. 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






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






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






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






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






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






20. The number of times each data value occurs






21. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.






22. Parameter






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






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






25. The important aspects of the data are called?






26. 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






27. The pattern of variation of data. The distribution may be described as symmetrical - positively skewed - or negatively skewed






28. Members of the population select themselves by volunteering






29. Mean - mode - median and midrange.






30. Test use normalcdf(ZTS -999)






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






32. Can be used to get an initial graphical view of data






33. 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






34. 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






35. A numerical quantity measuring some aspect of the population






36. Sample proportion






37. 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






38. Sample mean






39. Sample standard deviation






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






41. Complement of p






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






43. Collection of information from a sample






44. Capital sigma; summation






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






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






47. Standard scores and percentile






48. Sample variance






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






50. 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