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






2. Mean - mode - median and midrange.






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






4. Lowercase sigma; population standard deviaition






5. Sum of the values






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






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






8. Sample mean






9. Sample variance






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






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






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






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






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






15. One extreme value can affect it dramatically.






16. Collection of information from a sample






17. The number of times each data value occurs






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






19. 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






20. A numerical quantity measuring some aspect of the population






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






22. 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






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






24. Sample proportion






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






26. Type II error is measured






27. Statistics






28. Graph involving pictures of objects in which the size of the object in which the size of the object in the picture represents the relative size of the quantity being represented by the object.






29. Type of bar graph that shows frequency distributions






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






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






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






33. Sample standard deviation






34. 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






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






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






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. Parameter






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






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






41. Null hypothesis






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






43. Population variance






44. 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






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






46. Test use normalcdf(ZTS -999)






47. _______________ 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






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






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






50. Sample size or number of trials