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






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






3. Null hypothesis






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






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






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






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






8. A numerical quantity measuring some aspect of the population






9. Alternative hypothesis






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






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






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






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






14. Always use a equal symbol






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






16. Is a sample containing similar characteristics of the population






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






18. Sample variance






19. 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






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






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






22. _______________ 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






23. Population proportion






24. One extreme value can affect it dramatically.






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






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






27. Members of the population select themselves by volunteering






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






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






30. 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






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






32. Capital sigma; summation






33. 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.






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






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






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






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






38. Complement of p






39. Sum of the values






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






41. 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






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






43. 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






44. Population variance






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






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






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






48. Collection of information from the whole population






49. Mean - mode - median and midrange.






50. The number of times each data value occurs