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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. Capital sigma; summation






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






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






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






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






6. The important aspects of the data are called?






7. 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






8. 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






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






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






11. Alternative hypothesis






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






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






14. Population size






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






16. Members of the population select themselves by volunteering






17. Is a sample containing similar characteristics of the population






18. Null hypothesis






19. 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.






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






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






22. 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






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






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






25. Population variance






26. Sample standard deviation






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






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






29. _______________ 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






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






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






32. Sample variance






33. Probability of event A






34. 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






35. 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






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

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37. Always use a equal symbol






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






39. Type of bar graph that shows frequency distributions






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






41. Sample size or number of trials






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






43. Lowercase sigma; population standard deviaition






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






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






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






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






48. Sample mean






49. A subset of the population- it's important to choose a sample at random to avoid bias in the results






50. Standard scores and percentile