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






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






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






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






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






6. Information about individuals in a population






7. Capital sigma; summation






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






9. The number of times each data value occurs






10. Members of the population select themselves by volunteering






11. 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






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






13. Lowercase sigma; population standard deviaition






14. 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






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


16. Sample proportion






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






18. One extreme value can affect it dramatically.






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






20. Null hypothesis






21. Mean - mode - median and midrange.






22. Mu; population mean






23. The important aspects of the data are called?






24. 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






25. 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






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






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






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






29. 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






30. Sum of the values






31. 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






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






33. Alternative hypothesis






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






35. 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






36. Standard scores and percentile






37. Level of measurement- Is like the ordinal level - with the additional property that we can determine meaningful amounts of differences between data. However - there is no inherent (natural) zero starting point (where none of the quantity is present).






38. Is a sample containing similar characteristics of the population






39. Sample standard deviation






40. Sample size or number of trials






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






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






43. 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






44. _______________ 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






45. Complement of p






46. Type of bar graph that shows frequency distributions






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






48. Test use normalcdf(ZTS -999)






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






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