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






2. Parameter






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






4. Type of bar graph that shows frequency distributions






5. Sample mean






6. Population is organized into groups (i.e - neighborhoods/departments) - and sampling unit is selected by a simple random sample






7. 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






8. Sample proportion






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






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






11. Sum of the values






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






13. Type II error is measured






14. Sample variance






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






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






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






18. Null hypothesis






19. Standard scores and percentile






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






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






22. Population proportion






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






24. 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






25. Population variance






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






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






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






29. 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






30. Sample standard deviation






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






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






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






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






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






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






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

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38. One extreme value can affect it dramatically.






39. Population size






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






41. Members of the population select themselves by volunteering






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






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






44. 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






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






46. A method in which you randomly choose one number from 'l' to 'k' and continue to select the kth element






47. A visual exploratory data analysis technique that shows the shape of a distribution - this kind of display uses the actual values of the variable to present the shape of the distribution of data values






48. 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






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






50. Statistics







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