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






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






3. 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






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






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






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






7. Statistics






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






9. Test use normalcdf(ZTS -999)






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






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






12. Range - standard deviation and variance.






13. _______________ 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






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






15. Members of the population select themselves by volunteering






16. Standard scores and percentile






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






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






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






20. 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






21. Alternative hypothesis






22. Sample size or number of trials






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






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






25. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






26. Population size






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






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






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






30. 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






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






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






33. 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.






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






35. A visual exploratory data analysis technique that shows the shape of a distribution - this kind of display uses the actual values of the variable to present the shape of the distribution of data values






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






37. Collection of information from the whole population






38. Represents categories - and is nonnumerical in nature






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






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






41. 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






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






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






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






45. Population proportion






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






47. 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).






48. Mean - mode - median and midrange.






49. Sample proportion






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







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