Test your basic knowledge |

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. Always use a equal symbol






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






3. Sample variance






4. The important aspects of the data are called?






5. 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.






6. 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






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






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






9. A numerical quantity measuring some aspect of the population






10. One extreme value can affect it dramatically.






11. 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






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






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






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






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






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






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






18. Capital sigma; summation






19. Probability of event A






20. Complement of p






21. 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






22. 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






23. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION






24. 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






25. Sample mean






26. Collection of information from a sample






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






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






29. Sample standard deviation






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






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






32. 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






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






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






35. Parameter






36. Members of the population select themselves by volunteering






37. Mean - mode - median and midrange.






38. 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






39. Range - standard deviation and variance.






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






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






42. Population proportion






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






44. Null hypothesis






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






46. Is a sample containing similar characteristics of the population






47. Population variance






48. Sum of the values






49. Collection of information from the whole population






50. Alternative hypothesis