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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 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






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






3. Collection of information from a sample






4. 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






5. Using graphs and numerical summaries to describe variables in a data set and their relationship






6. Sum of the values






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






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






9. 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






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






11. Null hypothesis






12. Population size






13. Represents categories - and is nonnumerical in nature






14. A numerical quantity measuring some aspect of the population






15. 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






16. 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.






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






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






19. The important aspects of the data are called?






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






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






22. Capital sigma; summation






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






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






25. Parameter






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






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






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






29. Range - standard deviation and variance.






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






31. 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






32. Standard scores and percentile






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






34. _______________ 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






35. Alternative hypothesis






36. 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






37. 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






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






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






40. One extreme value can affect it dramatically.






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






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






43. The number of times each data value occurs






44. Always use a equal symbol






45. Information about individuals in a population






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






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






48. Sample variance






49. Probability of event A






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