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






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






3. Complement of p






4. 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






5. Information about individuals in a population






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






7. Population variance






8. One extreme value can affect it dramatically.






9. Sample size or number of trials






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






11. 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






12. Parameter






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






14. Population is organized into groups (i.e - neighborhoods/departments) - and sampling unit is selected by a simple random sample






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






16. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






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






18. Sample variance






19. Type II error is measured






20. Population proportion






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






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






23. Collection of information from the whole population






24. A descriptive tool used to visually describe the characteristics and relationships of collections of data quickly and attractively






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






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






27. Before they are arranged or analyzed - information or observations are called________.






28. _______________ 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






29. 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






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






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






32. Standard scores and percentile






33. Type of bar graph that shows frequency distributions






34. 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






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






36. Alternative hypothesis






37. Is a sample containing similar characteristics of the population






38. The important aspects of the data are called?






39. Represents categories - and is nonnumerical in nature






40. Null hypothesis






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






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

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






44. 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.






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






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






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






48. 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






49. Capital sigma; summation






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