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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. 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






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






3. 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






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






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






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






7. Parameter






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






9. Sample variance






10. Sample proportion






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






12. Collection of information from the whole population






13. 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.






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






15. 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).






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






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






18. 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






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






20. Capital sigma; summation






21. The important aspects of the data are called?






22. Sample mean






23. Sum of the values






24. 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






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






26. Null hypothesis






27. Type II error is measured






28. Information about individuals in a population






29. A method of experimentation in which you can control as many variables as possible in order to isolate the effects of a response variable






30. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






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






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






33. Represents categories - and is nonnumerical in nature






34. Statistics






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






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






37. Population proportion






38. 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






39. Level of measurement- involves data that consist of names - labels and categories only. The data cannot be arranged in an ordering scheme (such as low to high). (Example) Nationalities of survey respondents






40. Uses numerical and or visual techniques to summarize or describe the data in a clear effective manner






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






42. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.






43. 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






44. _______________ 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






45. Complement of p






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






47. Range - standard deviation and variance.






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






49. Sample size or number of trials






50. Standard scores and percentile