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






2. 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






3. Sum of the values






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






5. 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).






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






7. Population proportion






8. Mu; population mean






9. _______________ 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






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






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






12. Null hypothesis






13. 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






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






15. 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






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






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






18. 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






19. Represents categories - and is nonnumerical in nature






20. Sample standard deviation






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

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






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






24. Complement of p






25. Members of the population select themselves by volunteering






26. Information about individuals in a population






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






28. 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.






29. Collection of information from the whole population






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






31. Probability of event A






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






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






34. Alternative hypothesis






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






36. Population size






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






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






39. 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






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






41. 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






42. Sample variance






43. Capital sigma; summation






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






45. The number of times each data value occurs






46. Collection of information from a sample






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






48. Range - standard deviation and variance.






49. Population variance






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