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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. Mean - mode - median and midrange.






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. 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






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






5. Standard scores and percentile






6. 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






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






8. Population size






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






10. The number of times each data value occurs






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






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






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






14. Sample standard deviation






15. Members of the population select themselves by volunteering






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






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






18. Statistics






19. Collection of information from the whole population






20. Capital sigma; summation






21. A numerical quantity measuring some aspect of the population






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






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






24. Sample mean






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






26. 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






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






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






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






30. Parameter






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






32. Lowercase sigma; population standard deviaition






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






34. Sample variance






35. 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






36. 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).






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






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






39. Type II error is measured






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






41. Always use a equal symbol






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






43. 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.






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






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






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






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






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






49. 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






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