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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. Is denoted by 'n' - is the number of data values in the sample






2. Sample variance






3. 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






4. Parameter






5. 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






6. 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






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






8. 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






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






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






11. 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






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






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






14. Type of bar graph that shows frequency distributions






15. A numerical quantity measuring some aspect of the population






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






17. Sample mean






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






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






20. Null hypothesis






21. 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






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






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






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






25. Range - standard deviation and variance.






26. Sample standard deviation






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






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






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






30. 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.






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






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






33. Members of the population select themselves by volunteering






34. Information about individuals in a population






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






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






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






38. Statistics






39. 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






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






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






42. Probability of event A






43. Always use a equal symbol






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

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45. 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






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






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






48. Mu; population mean






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






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