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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. Population proportion






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






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






4. Members of the population select themselves by volunteering






5. Population variance






6. Parameter






7. Population size






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






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






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






11. Always use a equal symbol






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






13. 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






14. One extreme value can affect it dramatically.






15. Sample proportion






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






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






18. 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






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






20. 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).






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






22. 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






23. 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






24. Is a sample containing similar characteristics of the population






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






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






27. 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






28. Alternative hypothesis






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






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






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






32. The number of times each data value occurs






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






34. 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.






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






37. Collection of information from the whole population






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






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






40. 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






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






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






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






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






45. 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






46. Type of bar graph that shows frequency distributions






47. Collection of information from a sample






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






49. Sample standard deviation






50. Sample variance