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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. Null hypothesis






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






3. The number of times each data value occurs






4. Collection of information from a sample






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






6. 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






7. Sample standard deviation






8. 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






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






10. _______________ 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






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






12. Standard scores and percentile






13. Population variance






14. 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).






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






16. Statistics






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






18. Is a sample containing similar characteristics of the population






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






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






21. Type II error is measured






22. Mu; population mean






23. Probability of event A






24. 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






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






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






27. Sample mean






28. Complement of p






29. 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






30. When the distribution of the data values tend to be concentrated toward one end of the display or tail of the distribution - while the data values in the other tail are spread out through extreme values resulting in a longer tail






31. One extreme value can affect it dramatically.






32. Type of bar graph that shows frequency distributions






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






34. Sample variance






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






36. Always use a equal symbol






37. Sample size or number of trials






38. Collection of information from the whole population






39. 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.






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






41. Capital sigma; summation






42. 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






43. 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






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

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






46. Population size






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






48. Range - standard deviation and variance.






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






50. 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