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






2. 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






3. Sum of the values






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






5. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies






6. Sample variance






7. Is a sample containing similar characteristics of the population






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






9. Complement of p






10. 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






11. Capital sigma; summation






12. Type of bar graph that shows frequency distributions






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






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






15. Sample proportion






16. Information about individuals in a population






17. Alternative hypothesis






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






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






20. The important aspects of the data are called?






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






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






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






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






25. 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






26. Null hypothesis






27. Always use a equal symbol






28. Mu; population mean






29. Sample standard deviation






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






31. 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






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






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






34. Probability of event A






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






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






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






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

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39. Collection of information from a sample






40. 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






41. Population size






42. 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.






43. 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






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






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






47. The number of times each data value occurs






48. A numerical quantity measuring some aspect of the population






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






50. Mean - mode - median and midrange.