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






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






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






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






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






6. Type II error is measured






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






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






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






10. Test use normalcdf(ZTS -999)






11. Sample size or number of trials






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






13. 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






14. Is a sample containing similar characteristics of the population






15. Is the portion of the population that is selected for study






16. Mu; population mean






17. 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






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






19. Probability of event A






20. Alternative hypothesis






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






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






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

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24. Complement of p






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






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






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






28. Statistics






29. 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






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






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






32. Population size






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






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






35. Standard scores and percentile






36. Information about individuals in a population






37. 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






38. The important aspects of the data are called?






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






40. Lowercase sigma; population standard deviaition






41. 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






42. Capital sigma; summation






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






44. Mean - mode - median and midrange.






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






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






47. 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).






48. Sum of the values






49. Members of the population select themselves by volunteering






50. Sample proportion