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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. Sample proportion






2. Sample size or number of trials






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






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






5. Members of the population select themselves by volunteering






6. Parameter






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






8. A numerical quantity measuring some aspect of the population






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






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






11. 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






12. 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






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

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






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






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






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






18. Population proportion






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






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






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






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






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






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






25. Sum of the values






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






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






28. 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






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






30. _______________ 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






31. Test use normalcdf(ZTS -999)






32. Sample variance






33. Range - standard deviation and variance.






34. Mean - mode - median and midrange.






35. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc






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






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






38. Population size






39. 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






40. Type II error is measured






41. Mu; population mean






42. Is a sample containing similar characteristics of the population






43. Statistics






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






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






46. 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






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






48. Always use a equal symbol






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






50. One extreme value can affect it dramatically.