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






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






3. _______________ 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






4. Is a sample containing similar characteristics of the population






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






6. Null hypothesis






7. 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






8. Population variance






9. 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






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






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






12. Population proportion






13. Mu; population mean






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






15. Range - standard deviation and variance.






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






17. Standard scores and percentile






18. Mean - mode - median and midrange.






19. 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.






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






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






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






23. 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






24. Members of the population select themselves by volunteering






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






26. 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






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






28. One extreme value can affect it dramatically.






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






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






31. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).






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






33. Complement of p






34. 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






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






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






37. 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






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






39. Sample mean






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






41. Information about individuals in a population






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






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






44. Sample proportion






45. 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






46. 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






47. Represents categories - and is nonnumerical in nature






48. Always use a equal symbol






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






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