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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. Sum of the values






2. 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






3. One extreme value can affect it dramatically.






4. Sample standard deviation






5. Collection of information from the whole population






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






7. Parameter






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






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






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. Probability of event A






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






13. Sample proportion






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






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






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






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






18. Represents categories - and is nonnumerical in nature






19. 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






20. 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






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






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






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






24. 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






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






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






27. The important aspects of the data are called?






28. Alternative hypothesis






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






30. Mean - mode - median and midrange.






31. Members of the population select themselves by volunteering






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






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






34. Standard scores and percentile






35. Capital sigma; summation






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






37. _______________ 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






38. Null hypothesis






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






40. 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






41. Sample mean






42. Population variance






43. 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






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






45. Population proportion






46. Mu; population mean






47. The number of times each data value occurs






48. 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






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






50. 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






Can you answer 50 questions in 15 minutes?



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