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






2. Sample mean






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






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






5. Probability of event A






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






7. The important aspects of the data are called?






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






9. Always use a equal symbol






10. Members of the population select themselves by volunteering






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






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






13. Collection of information from the whole population






14. 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






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






16. 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.






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






18. Null hypothesis






19. 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






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






21. Type of bar graph that shows frequency distributions






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






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






24. 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






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






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. Lowercase sigma; population standard deviaition






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






29. 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






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






31. 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






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






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






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






35. Range - standard deviation and variance.






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






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






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

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






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






41. _______________ 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






42. Represents categories - and is nonnumerical in nature






43. 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).






44. Standard scores and percentile






45. Population size






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






47. Test use normalcdf(ZTS -999)






48. Is a sample containing similar characteristics of the population






49. Mean - mode - median and midrange.






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