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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. Capital sigma; summation






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






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






4. Always use a equal symbol






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






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






7. Complement of p






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






9. Type II error is measured






10. 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






11. 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






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






13. Parameter






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






15. Information about individuals in a population






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






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






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






19. _______________ 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






20. Test use normalcdf(ZTS -999)






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. Range - standard deviation and variance.






23. Mean - mode - median and midrange.






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






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






26. 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






27. 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






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






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






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






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






32. 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






33. 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






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






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






36. 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






37. Type of bar graph that shows frequency distributions






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






39. Sample proportion






40. 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.






41. Population proportion






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






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






44. Standard scores and percentile






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






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






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






48. Statistics






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






50. Null hypothesis







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Can you answer 50 questions in 15 minutes?


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