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






2. Collection of information from the whole population






3. Alternative hypothesis






4. Sample proportion






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






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






7. When the distribution of the data values tend to be concentrated toward one end of the display or tail of the distribution - while the data values in the other tail are spread out through extreme values resulting in a longer tail






8. Sample mean






9. Statistics






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






11. Members of the population select themselves by volunteering






12. Type II error is measured






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






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






15. Test use normalcdf(ZTS -999)






16. 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






17. 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.






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






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






20. 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






21. Complement of p






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






23. 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






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






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






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






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






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






29. Sample standard deviation






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






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






32. Collection of information from a sample






33. Mu; population mean






34. One extreme value can affect it dramatically.






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






36. Standard scores and percentile






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






38. Represents categories - and is nonnumerical in nature






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






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






41. Population variance






42. Mean - mode - median and midrange.






43. Always use a equal symbol






44. Null hypothesis






45. Population size






46. 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






47. The important aspects of the data are called?






48. Probability of event A






49. 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






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







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