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






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






3. Type of bar graph that shows frequency distributions






4. 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.






5. Mean - mode - median and midrange.






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






7. Collection of information from a sample






8. A numerical quantity measuring some aspect of the population






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






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






11. Sample proportion






12. Standard scores and percentile






13. Is a sample containing similar characteristics of the population






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






15. Population proportion






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






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






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






19. One extreme value can affect it dramatically.






20. Population size






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






22. Level of measurement- Involves data that may be arranged in some order - but differences between data values either cannot be determined or are meaningless. (Example) Questions on a survey are scored with integers 1 thru 5 with 1 representing strong






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






24. 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






25. 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).






26. Sample mean






27. 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






28. 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






29. _______________ 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






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






31. 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






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






33. 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






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






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






36. Complement of p






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






38. Population variance






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






40. Null hypothesis






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






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






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






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






45. Probability of event A






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






47. Always use a equal symbol






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






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






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

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