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






2. Sum of the values






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






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






5. _______________ 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






6. 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.






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






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






9. Mu; population mean






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






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






12. 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






13. One extreme value can affect it dramatically.






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






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. Complement of p






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






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

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






20. 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






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






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






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






24. Members of the population select themselves by volunteering






25. Sample mean






26. 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






27. Is a sample containing similar characteristics of the population






28. Population variance






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






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






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






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






33. Information about individuals in a population






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






35. Probability of event A






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






37. Represents categories - and is nonnumerical in nature






38. The important aspects of the data are called?






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






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






41. 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






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






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






44. 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).






45. Collection of information from the whole population






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






47. Type of bar graph that shows frequency distributions






48. Parameter






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






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