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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. A numerical quantity measuring some aspect of the population






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






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






4. To divide the population into 2 or more non-overlapping subsets called strata






5. Is a sample containing similar characteristics of the population






6. Mean - mode - median and midrange.






7. Alternative hypothesis






8. 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






9. The important aspects of the data are called?






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






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






12. Collection of information from the whole population






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






14. Mu; population mean






15. 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






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






17. Population variance






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






19. Lowercase sigma; population standard deviaition






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






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






22. Information about individuals in a population






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






24. 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.






25. Standard scores and percentile






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






27. Null hypothesis






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






29. Sample standard deviation






30. Collection of information from a sample






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






32. Population proportion






33. Always use a equal symbol






34. 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






35. A sample which is selected in such a manner - that each data value of the population has a non-zero probability of being selected for the sample






36. Sample mean






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

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






39. Sum of the values






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






41. Represents categories - and is nonnumerical in nature






42. Members of the population select themselves by volunteering






43. Statistics






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






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






46. Type II error is measured






47. _______________ 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






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






49. Capital sigma; summation






50. One extreme value can affect it dramatically.