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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. Null hypothesis






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






3. Is denoted by 'n' - is the number of data values in the sample






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






5. Statistics






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






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






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






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






10. Determine the location of the middle value of all the data values






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






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






13. Collection of information from a sample






14. 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






15. The important aspects of the data are called?






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






17. 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






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






19. A method of data collection where the researcher selects a sample from the population and measures the variable of interest






20. Population size






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






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

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






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






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






26. A numerical quantity measuring some aspect of the population






27. 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






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






29. 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






30. Alternative hypothesis






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






32. Mu; population mean






33. Is a sample containing similar characteristics of the population






34. 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.






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






36. Probability of event A






37. Always use a equal symbol






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






39. _______________ 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






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






41. 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






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






43. Population variance






44. Population proportion






45. 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






46. Standard scores and percentile






47. Type of bar graph that shows frequency distributions






48. Mean - mode - median and midrange.






49. Sample proportion






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