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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. Collection of information from the whole population






2. For a left tailed test use normalcdf(-999 - ZTS)






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






4. Sample proportion






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






6. 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






7. Population size






8. Null hypothesis






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






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






11. One extreme value can affect it dramatically.






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






13. Population proportion






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






15. Is a sample containing similar characteristics of the population






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






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






18. Alternative hypothesis






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






20. Mean - mode - median and midrange.






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






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






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






24. Population variance






25. _______________ 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






26. 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.






27. 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






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






29. Always use a equal symbol






30. Test use normalcdf(ZTS -999)






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






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






33. Probability of event A






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






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






36. 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).






37. 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






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






39. Sample mean






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






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






42. 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






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






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






45. 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






46. Type of bar graph that shows frequency distributions






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






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






49. Collection of information from a sample






50. Complement of p