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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. Statistics






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






3. Represents categories - and is nonnumerical in nature






4. 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






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






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






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






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






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






10. Null hypothesis






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






12. The number of times each data value occurs






13. Capital sigma; summation






14. Test use normalcdf(ZTS -999)






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






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






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






18. Range - standard deviation and variance.






19. Always use a equal symbol






20. 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






21. Sum of the values






22. 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).






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






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






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






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






27. Sample variance






28. One extreme value can affect it dramatically.






29. 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






30. The important aspects of the data are called?






31. 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






32. Collection of information from the whole population






33. Type of bar graph that shows frequency distributions






34. Parameter






35. Mean - mode - median and midrange.






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






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






38. 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






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






40. Type II error is measured






41. Population proportion






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






43. Collection of information from a sample






44. A numerical quantity measuring some aspect of the population






45. Sample standard deviation






46. _______________ 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






47. 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






48. Members of the population select themselves by volunteering






49. Alternative hypothesis






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