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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. Statistics






3. _______________ are numerical measurements that can assume any value between two numbers






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






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






6. Sample size or number of trials






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






8. Collection of information from a sample






9. 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






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






11. Mean - mode - median and midrange.






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






13. 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






14. 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






15. Population proportion






16. Alternative hypothesis






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






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






19. Population variance






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






21. Population size






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






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






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






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






26. Test use normalcdf(ZTS -999)






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






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






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






30. Is a number that describes a characteristic of a population






31. The important aspects of the data are called?






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






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






34. Lowercase sigma; population standard deviaition






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






36. One extreme value can affect it dramatically.






37. Collection of information from the whole population






38. Always use a equal symbol






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






40. 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






41. Null hypothesis






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






43. Type of bar graph that shows frequency distributions






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






45. 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






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






47. Complement of p






48. 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






49. Sample proportion






50. 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.