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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. 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






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






4. The number of times each data value occurs






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






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






7. Complement of p






8. 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






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






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






11. Sample variance






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






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






14. Always use a equal symbol






15. Mean - mode - median and midrange.






16. 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






17. Information about individuals in a population






18. Collection of information from a sample






19. Population variance






20. Alternative hypothesis






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






22. The important aspects of the data are called?






23. Is a number that describes a characteristic of a sample

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24. Parameter






25. Represents categories - and is nonnumerical in nature






26. Sum of the values






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






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






29. Sample size or number of trials






30. Sample proportion






31. A numerical quantity measuring some aspect of the population






32. One extreme value can affect it dramatically.






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






34. _______________ 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






35. Null hypothesis






36. Mu; population mean






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






38. 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






39. Standard scores and percentile






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






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






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






43. A method in which you randomly choose one number from 'l' to 'k' and continue to select the kth element






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






45. Type of bar graph that shows frequency distributions






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






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






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






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






50. 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