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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. Collection of information from the whole population






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






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

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






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






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






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






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






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






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






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






12. 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






13. Type II error is measured






14. Sample variance






15. Always use a equal symbol






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






17. The important aspects of the data are called?






18. 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






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






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






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






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






23. Information about individuals in a population






24. Alternative hypothesis






25. 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






26. Type of bar graph that shows frequency distributions






27. Represents categories - and is nonnumerical in nature






28. Parameter






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






30. Sample size or number of trials






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






32. (largest data value) - (smallest data value)






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






34. 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






35. Lowercase sigma; population standard deviaition






36. Statistics






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






38. The number of times each data value occurs






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






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






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






42. Sample mean






43. Capital sigma; summation






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






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






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






48. 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






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






50. Sum of the values







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Can you answer 50 questions in 15 minutes?


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