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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 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






2. Sample proportion






3. 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






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






5. Population proportion






6. One extreme value can affect it dramatically.






7. Always use a equal symbol






8. Information about individuals in a population






9. Probability of event A






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






11. Represents categories - and is nonnumerical in nature






12. Standard scores and percentile






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






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






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






16. 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






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






18. Complement of p






19. Mean - mode - median and midrange.






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






21. 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






22. Sample standard deviation






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






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






25. Sample mean






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






27. Type of bar graph that shows frequency distributions






28. 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






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






30. 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






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






32. Type II error is measured






33. 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






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






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






36. Alternative hypothesis






37. Null hypothesis






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






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

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






41. Statistics






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






43. Population size






44. The important aspects of the data are called?






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






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






47. 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






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






49. The number of times each data value occurs






50. Collection of information from a sample