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






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






3. Population size






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






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






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






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. Information about individuals in a population






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






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






11. 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






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






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






14. Sample size or number of trials






15. Null hypothesis






16. Sample standard deviation






17. Type of bar graph that shows frequency distributions






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






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






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






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






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






24. Sum of the values






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






26. Population variance






27. Test use normalcdf(ZTS -999)






28. Range - standard deviation and variance.






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






30. 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






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






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






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






34. Capital sigma; summation






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






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






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






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






39. Represents categories - and is nonnumerical in nature






40. 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






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






42. 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






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






44. Standard scores and percentile






45. Sample variance






46. Always use a equal symbol






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






48. The important aspects of the data are called?






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






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