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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 you randomly choose one number from 'l' to 'k' and continue to select the kth element






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






3. 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






4. Mu; population mean






5. Alternative hypothesis






6. Range - standard deviation and variance.






7. Population size






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






9. Information about individuals in a population






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






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






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






13. Population proportion






14. Lowercase sigma; population standard deviaition






15. 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






16. Collection of information from the whole population






17. 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






18. 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






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






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






21. Probability of event A






22. Statistics






23. Always use a equal symbol






24. 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






25. Sample size or number of trials






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






27. Members of the population select themselves by volunteering






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






29. 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.






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






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






32. Sample variance






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






34. Type of bar graph that shows frequency distributions






35. The number of times each data value occurs






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






37. Sample mean






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






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






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






41. Complement of p






42. Sum of the values






43. Population variance






44. 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






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






46. Null hypothesis






47. Mean - mode - median and midrange.






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






49. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc






50. The important aspects of the data are called?