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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. Capital sigma; summation






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






3. 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






4. The number of times each data value occurs






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






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






7. Sample size or number of trials






8. Type of bar graph that shows frequency distributions






9. Alternative hypothesis






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






12. 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






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






14. Statistics






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






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






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






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






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






20. 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






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






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






23. Is a sample containing similar characteristics of the population






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






25. 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






26. Population proportion






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






28. _______________ 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






29. Sample standard deviation






30. Range - standard deviation and variance.






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






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






33. 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






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






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






36. Information about individuals in a population






37. The important aspects of the data are called?






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






39. One extreme value can affect it dramatically.






40. 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






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






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






43. Collection of information from a sample






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






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






46. Test use normalcdf(ZTS -999)






47. Complement of p






48. 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






49. Is denoted by 'n' - is the number of data values in the sample






50. Probability of event A