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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. Population proportion






2. Sample size or number of trials






3. A numerical quantity measuring some aspect of the population






4. Level of measurement- involves data that consist of names - labels and categories only. The data cannot be arranged in an ordering scheme (such as low to high). (Example) Nationalities of survey respondents






5. 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






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






7. Null hypothesis






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






9. 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).






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






11. Members of the population select themselves by volunteering






12. Alternative hypothesis






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






14. 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.






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






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






17. Test use normalcdf(ZTS -999)






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






19. 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






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






21. Sample variance






22. Collection of information from the whole population






23. 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






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






25. 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






26. Sample mean






27. Sample proportion






28. Complement of p






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






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






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






32. The number of times each data value occurs






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






34. 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






35. 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






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






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






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






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






40. Is a sample containing similar characteristics of the population






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






42. Sample standard deviation






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






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






45. Probability of event A






46. Range - standard deviation and variance.






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






48. Capital sigma; summation






49. Population size






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