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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. Is a sample containing similar characteristics of the population






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






3. 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






4. Information about individuals in a population






5. 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






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






7. One extreme value can affect it dramatically.






8. Population variance






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






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






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






12. 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.






13. Standard scores and percentile






14. Always use a equal symbol






15. Is a number that describes a characteristic of a 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. Is a collection of several data pertaining to one or more variables






18. Collection of information from a sample






19. 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






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






21. Range - standard deviation and variance.






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






23. Statistics






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






25. Capital sigma; summation






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






27. The important aspects of the data are called?






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






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






30. Complement of p






31. Sample proportion






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






33. 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






34. Type II error is measured






35. Probability of event A






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






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






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






39. Parameter






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






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






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






43. To calculate the percentile take the number of values less than x - divide by total number of values and times by 100.






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. Sample size or number of trials






46. Sample variance






47. Population proportion






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. Alternative hypothesis






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