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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. 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






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






3. Always use a equal symbol






4. Range - standard deviation and variance.






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






6. Level of measurement- Involves data that may be arranged in some order - but differences between data values either cannot be determined or are meaningless. (Example) Questions on a survey are scored with integers 1 thru 5 with 1 representing strong






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






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






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






10. Collection of information from the whole population






11. Is a sample containing similar characteristics of the population






12. Statistics






13. Sum of the values






14. Lowercase sigma; population standard deviaition






15. Mean - mode - median and midrange.






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






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






18. Population size






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






20. Type of bar graph that shows frequency distributions






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






22. Alternative hypothesis






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






24. Parameter






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






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






27. Type II error is measured






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






29. _______________ are numerical values that can assume only a limited number of values






30. 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






31. Mu; population mean






32. 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






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






34. Capital sigma; summation






35. Test use normalcdf(ZTS -999)






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






37. Sample mean






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






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






40. 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.






41. Sample standard deviation






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






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






44. Sample variance






45. A numerical quantity measuring some aspect of the population






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






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






48. The important aspects of the data are called?






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






50. The number of times each data value occurs






Can you answer 50 questions in 15 minutes?



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