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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. 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






2. 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






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






4. Mu; population mean






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






6. 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.






7. Type II error is measured






8. Population variance






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






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






11. One extreme value can affect it dramatically.






12. Statistics






13. 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






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






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






16. Sample size or number of trials






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

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18. Type of bar graph that shows frequency distributions






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






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






21. Sample variance






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






23. Collection of information from the whole population






24. Parameter






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






26. Is a number that describes a characteristic of a population






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






28. Alternative hypothesis






29. Standard scores and percentile






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






31. 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






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






33. Population proportion






34. Capital sigma; summation






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






36. Mean - mode - median and midrange.






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






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






39. Sample mean






40. Complement of p






41. _______________ 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






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






43. 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






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






45. Range - standard deviation and variance.






46. Represents categories - and is nonnumerical in nature






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






48. Create a sample by using data from population members that are readily available






49. 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).






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