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






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






3. One extreme value can affect it dramatically.






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






5. Information about individuals in a population






6. A numerical quantity measuring some aspect of the population






7. Collection of information from the whole population






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






9. Mu; population mean






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






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






12. 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






13. Type II error is measured






14. 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






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






16. 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






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






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






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






20. A number that is used to describe a characteristic of a sample - such as a sample average - is called a __________.






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






22. Sample proportion






23. Is a number that describes a characteristic of a sample


24. Capital sigma; summation






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






26. Is the process of selecting a portion - or sample - of the entire population






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






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






29. Sum of the values






30. Middle value of a set of data values after they've been arranged in numerical order - 1. First arrange data values in numerical order 2. For odd # of data values - the median is the middle data value 3. For even # of data values - the median is the m






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






32. Type of bar graph that shows frequency distributions






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






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






35. Statistics






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






37. Collection of information from a sample






38. Always use a equal symbol






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






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






41. Is a sample containing similar characteristics of the population






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






43. 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






44. Represents categories - and is nonnumerical in nature






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






46. Standard scores and percentile






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






48. 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






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






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