Test your basic knowledge |

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. 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






2. Sum of the values






3. Sample mean






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






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






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






7. Collection of information from a sample






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






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






10. Population size






11. 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






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






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






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






15. Range - standard deviation and variance.






16. Sample variance






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






18. Is a sample that has the pertinent characteristics of the population in the same proportion - as they are included in that population






19. Null hypothesis






20. Is a sample containing similar characteristics of the population






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






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






23. Members of the population select themselves by volunteering






24. Complement of p






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






26. 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






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






28. Sample proportion






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






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






31. 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






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






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






34. _______________ 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






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






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. 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






38. Probability of event A






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 numerical quantity measuring some aspect of the population






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






42. Sample size or number of trials






43. Statistics






44. Sample standard deviation






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






46. Alternative hypothesis






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






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






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






50. Lowercase sigma; population standard deviaition