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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. _______________ 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






2. 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






3. One extreme value can affect it dramatically.






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






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






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






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






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






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


10. Capital sigma; summation






11. Parameter






12. Sample variance






13. Represents categories - and is nonnumerical in nature






14. The number of times each data value occurs






15. Sum of the values






16. Test use normalcdf(ZTS -999)






17. 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






18. Complement of p






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






20. 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






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






22. 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






23. Sample mean






24. Is a sample containing similar characteristics of the population






25. Standard scores and percentile






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






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






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






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






30. Sample size or number of trials






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






32. Probability of event A






33. Collection of information from the whole population






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






35. Type of bar graph that shows frequency distributions






36. 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.






37. 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






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






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






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






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






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






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






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






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






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






47. The important aspects of the data are called?






48. Occur when one of them affects the probability of the other.






49. Type II error is measured






50. Lowercase sigma; population standard deviaition