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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. Null hypothesis






2. 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






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






4. 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






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






6. Sample size or number of trials






7. 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.






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






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






10. Test use normalcdf(ZTS -999)






11. Type II error is measured






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






13. Always use a equal symbol






14. Population proportion






15. Members of the population select themselves by volunteering






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






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






18. Standard scores and percentile






19. Capital sigma; summation






20. Mu; population mean






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






22. Parameter






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






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






25. Is a sample containing similar characteristics of the population






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






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






28. 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






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






30. The important aspects of the data are called?






31. Type of bar graph that shows frequency distributions






32. 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






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






34. 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






35. 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






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






37. The number of times each data value occurs






38. A numerical quantity measuring some aspect of the population






39. 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






40. Statistics






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






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






43. 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






44. Information about individuals in a population






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






46. Range - standard deviation and variance.






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






48. Sample standard deviation






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






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