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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. Represents categories - and is nonnumerical in nature






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






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






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






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






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






7. 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






8. Probability of event A






9. Collection of information from a sample






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






11. One extreme value can affect it dramatically.






12. 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






13. Type of bar graph that shows frequency distributions






14. Members of the population select themselves by volunteering






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






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






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






18. 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






19. Population size






20. 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






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






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






23. The important aspects of the data are called?






24. Sample proportion






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






26. 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






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






28. Is a sample containing similar characteristics of the population






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






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






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






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






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

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






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






36. 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






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






38. Mu; population mean






39. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies






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






41. Mean - mode - median and midrange.






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






43. Type II error is measured






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






45. 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






46. Sum of the values






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






48. Test use normalcdf(ZTS -999)






49. 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






50. Capital sigma; summation