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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. Collection of information from a sample






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






4. When the distribution of the data values greater than the center of the display - and the data values less than the center of the display are mirror images of each other






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






6. 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






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






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






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






10. Sum of the values






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






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






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






14. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.






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






16. Always use a equal symbol






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






18. Parameter






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






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






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

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22. Sample mean






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






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






25. Information about individuals in a population






26. The number of times each data value occurs






27. 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






28. The important aspects of the data are called?






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






30. Lowercase sigma; population standard deviaition






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






32. 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






33. A collection of individuals about which we want to draw conclusions






34. 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.






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- 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






37. Sample size or number of trials






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






39. _______________ 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






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






41. 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






42. Complement of p






43. Sample standard deviation






44. 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).






45. 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






46. Population proportion






47. Members of the population select themselves by volunteering






48. Type of bar graph that shows frequency distributions






49. Is a sample that has the pertinent characteristics of the population in the same proportion - as they are included in that population






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