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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. Lowercase sigma; population standard deviaition






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






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






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






5. 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






6. Population size






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






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






9. Type of bar graph that shows frequency distributions






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






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






12. Null hypothesis






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






14. Is a sample containing similar characteristics of the population






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






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






17. Complement of p






18. One extreme value can affect it dramatically.






19. Level of measurement- involves data that consist of names - labels and categories only. The data cannot be arranged in an ordering scheme (such as low to high). (Example) Nationalities of survey respondents






20. Sample size or number of trials






21. Standard scores and percentile






22. 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






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






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






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






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






27. Collection of information from a sample






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






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






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






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






32. Information about individuals in a population






33. Always use a equal symbol






34. _______________ 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






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






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






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






40. 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






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






42. Population proportion






43. Mean - mode - median and midrange.






44. 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






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






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






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






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






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






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

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