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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. 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






2. Capital sigma; summation






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






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






5. Variable where the value is a number that results from a measurement process - also called numerical data






6. Probability of event A






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






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






9. Collection of information from a sample






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






11. The important aspects of the data are called?






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






13. Alternative hypothesis






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






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






16. 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






17. Range - standard deviation and variance.






18. Always use a equal symbol






19. Collection of information from the whole population






20. Population proportion






21. The number of times each data value occurs






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






23. Mu; population mean






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






25. Complement of p






26. Standard scores and percentile






27. 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






28. Type of bar graph that shows frequency distributions






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






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






31. One extreme value can affect it dramatically.






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






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






34. Population size






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






36. 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






37. Represents categories - and is nonnumerical in nature






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






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






40. 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






41. Sample mean






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






43. Sample size or number of trials






44. 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






45. 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.






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






47. Population variance






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






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






50. Null hypothesis







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Can you answer 50 questions in 15 minutes?


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