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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. 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






2. Sample mean






3. Test use normalcdf(ZTS -999)






4. Type of bar graph that shows frequency distributions






5. Always use a equal symbol






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






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






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






9. Population variance






10. Population proportion






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






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






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






14. 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






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






16. 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






17. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.






18. Lowercase sigma; population standard deviaition






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

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






21. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).






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






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






24. Parameter






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






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






27. 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






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






29. Collection of information from a sample






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






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






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






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






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






35. Sum of the values






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






37. Mu; population mean






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






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






40. Complement of p






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






42. Sample proportion






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






44. Sample standard deviation






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






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






48. 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






49. Represents categories - and is nonnumerical in nature






50. 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







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