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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. 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.






2. 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






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






4. Probability of event A






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






6. Always use a equal symbol






7. _______________ 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






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






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






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






11. Sample size or number of trials






12. Standard scores and percentile






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






14. Null hypothesis






15. Lowercase sigma; population standard deviaition






16. Is a sample containing similar characteristics of the population






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






18. Range - standard deviation and variance.






19. Collection of information from the whole population






20. 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






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






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






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






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

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






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






27. Sample mean






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






29. 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






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






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






32. Sample variance






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






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






35. The important aspects of the data are called?






36. 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






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






38. Sample standard deviation






39. Population variance






40. 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






41. Represents categories - and is nonnumerical in nature






42. Test use normalcdf(ZTS -999)






43. Capital sigma; summation






44. One extreme value can affect it dramatically.






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






46. Population proportion






47. Complement of p






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






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






50. The number of times each data value occurs