Test your basic knowledge |

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






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






3. Represents categories - and is nonnumerical in nature






4. Always use a equal symbol






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






6. Mu; population mean






7. Information about individuals in a population






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






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






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






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






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






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. Sample size or number of trials






15. 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






16. 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






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






18. One extreme value can affect it dramatically.






19. Alternative hypothesis






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






21. _______________ 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






22. Standard scores and percentile






23. Sample proportion






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






25. Is a sample containing similar characteristics of the population






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






27. Range - standard deviation and variance.






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






29. Sample standard deviation






30. Population size






31. Lowercase sigma; population standard deviaition






32. Statistics






33. 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






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






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






36. Mean - mode - median and midrange.






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






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






39. 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






40. Population proportion






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






42. Collection of information from a sample






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






44. Population variance






45. 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






46. 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






47. Probability of event A






48. 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






49. Complement of p






50. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc