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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 a sample






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






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






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






5. 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






6. Type of bar graph that shows frequency distributions






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






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






9. Mean - mode - median and midrange.






10. 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






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






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






13. Population proportion






14. Probability of event A






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






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






17. The number of times each data value occurs






18. _______________ 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






19. Alternative hypothesis






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






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






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






23. Represents categories - and is nonnumerical in nature






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






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






26. 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






27. 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.






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






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






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

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31. 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






32. Sample size or number of trials






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






34. Sum of the values






35. The important aspects of the data are called?






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






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






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






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






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






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






42. Collection of information from the whole population






43. 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






44. 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






45. Complement of p






46. 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






47. 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






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






49. Statistics






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