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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. 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).






2. 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






3. Alternative hypothesis






4. One extreme value can affect it dramatically.






5. Capital sigma; summation






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






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






8. Mean - mode - median and midrange.






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






10. 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.






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






12. 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






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






14. Sum of the values






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






16. A numerical quantity measuring some aspect of the population






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






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






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






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

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






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






23. Sample proportion






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






25. Range - standard deviation and variance.






26. Complement of p






27. Population size






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






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






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






31. Sample mean






32. Parameter






33. Sample size or number of trials






34. Sample standard deviation






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






36. 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






37. Collection of information from the whole population






38. Information about individuals in a population






39. 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






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






41. Always use a equal symbol






42. 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






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






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






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






46. Members of the population select themselves by volunteering






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






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






49. _______________ 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






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