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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 number that describes a characteristic of a sample


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






3. 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






4. Complement of p






5. Type of bar graph that shows frequency distributions






6. Sample size or number of trials






7. The number of times each data value occurs






8. Information about individuals in a population






9. Lowercase sigma; population standard deviaition






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






11. Is a sample containing similar characteristics of the population






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






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






14. Sum of the values






15. Always use a equal symbol






16. Sample mean






17. Mu; population mean






18. The important aspects of the data are called?






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






20. Null hypothesis






21. 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






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






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






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






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






26. Type II error is measured






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






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






29. Sample standard deviation






30. Members of the population select themselves by volunteering






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






32. Mean - mode - median and midrange.






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






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






35. Statistics






36. One extreme value can affect it dramatically.






37. Sample variance






38. Collection of information from a sample






39. 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






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






41. 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






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






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






44. Capital sigma; summation






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






46. Range - standard deviation and variance.






47. 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






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






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






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