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






2. The number of times each data value occurs






3. Population proportion






4. One extreme value can affect it dramatically.






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






6. _______________ 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






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






8. Range - standard deviation and variance.






9. Sample proportion






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






11. Alternative hypothesis






12. Standard scores and percentile






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






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






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






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






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






18. Collection of information from the whole population






19. Sample mean






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






21. 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






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






23. Is a sample containing similar characteristics of the population






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






25. 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






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






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






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






29. 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






30. Type of bar graph that shows frequency distributions






31. Null hypothesis






32. Population variance






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






34. A numerical quantity measuring some aspect of the population






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






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






37. Sample standard deviation






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






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






40. Information about individuals in a population






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






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






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






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






45. 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






46. Mean - mode - median and midrange.






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






48. Type II error is measured






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






50. 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