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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. A quantity calculated from data gathered from a sample- usually used to estimate a population parameter






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






3. 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






4. Null hypothesis






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






6. One extreme value can affect it dramatically.






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






8. Lowercase sigma; population standard deviaition






9. 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






10. 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).






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






12. Complement of p






13. Statistics






14. Sample mean






15. 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.






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






17. Type of bar graph that shows frequency distributions






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






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






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






21. 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






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






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






24. Always use a equal symbol






25. Collection of information from the whole population






26. Alternative hypothesis






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






28. Population variance






29. Type II error is measured






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






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






32. Population proportion






33. 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






34. Capital sigma; summation






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






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






37. Information about individuals in a population






38. A numerical quantity measuring some aspect of the population






39. 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






40. A method of data collection in which the objects of study are observed in their natural settings and the variables are recorded






41. Members of the population select themselves by volunteering






42. Middle value of a set of data values after they've been arranged in numerical order - 1. First arrange data values in numerical order 2. For odd # of data values - the median is the middle data value 3. For even # of data values - the median is the m






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






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






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






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






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

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






49. Probability of event A






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