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






2. Probability of event A






3. Population variance






4. Sample proportion






5. Members of the population select themselves by volunteering






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






7. Is a sample containing similar characteristics of the population






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






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






10. Population proportion






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






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






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






14. Is a number that describes a characteristic of a sample

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15. Statistics






16. A numerical quantity measuring some aspect of the population






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






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






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






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






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






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






23. For a left tailed test use normalcdf(-999 - ZTS)






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






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






26. Parameter






27. The important aspects of the data are called?






28. Information about individuals in a population






29. 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






30. Capital sigma; summation






31. Complement of p






32. Mean - mode - median and midrange.






33. 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






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






35. Always use a equal symbol






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






37. Sample variance






38. 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






39. Mu; population mean






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






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






42. Represents categories - and is nonnumerical in nature






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






44. 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.






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






46. 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






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






48. Population size






49. Sample standard deviation






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