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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. Sum of the values






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






3. 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.






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






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






6. 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






7. Capital sigma; summation






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






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






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






11. 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






12. Type of bar graph that shows frequency distributions






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






14. Standard scores and percentile






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






16. 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






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






18. Always use a equal symbol






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






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






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






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






23. Collection of information from a sample






24. Sample proportion






25. Complement of p






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






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






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






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






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






31. 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






32. 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).






33. A numerical quantity measuring some aspect of the population






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






35. Information about individuals in a population






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






37. Is a sample containing similar characteristics of the population






38. Mu; population mean






39. Sample mean






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






41. 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






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






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






44. The important aspects of the data are called?






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






46. Probability of event A






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






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






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






50. Range - standard deviation and variance.