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






2. Test use normalcdf(ZTS -999)






3. Population size






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






5. 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






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






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






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






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






10. 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






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






12. Capital sigma; summation






13. 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






14. 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).






15. The important aspects of the data are called?






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






17. Information about individuals in a population






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






19. Alternative hypothesis






20. Sum of the values






21. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc






22. The number of times each data value occurs






23. 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.






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






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






26. Population variance






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






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






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






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






32. Collection of information from the whole population






33. Standard scores and percentile






34. Members of the population select themselves by volunteering






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






37. Collection of information from a sample






38. 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






39. Type of bar graph that shows frequency distributions






40. 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






41. Is a sample containing similar characteristics of the population






42. Represents categories - and is nonnumerical in nature






43. 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






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






45. 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






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






47. Statistics






48. Sample size or number of trials






49. 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






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