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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. 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






2. Sample variance






3. Population proportion






4. Sample standard deviation






5. Population size






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






7. Sample size or number of trials






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






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






10. 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.






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






12. 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






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. Parameter






15. Test use normalcdf(ZTS -999)






16. 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






17. _______________ 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






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






19. Range - standard deviation and variance.






20. The important aspects of the data are called?






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






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






23. Capital sigma; summation






24. One extreme value can affect it dramatically.






25. Members of the population select themselves by volunteering






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






27. Probability of event A






28. Statistics






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






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






31. Complement of p






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






33. Information about individuals in a population






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






35. Collection of information from the whole population






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






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. 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






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






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






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






42. Has the same shape and horizontal scale as a histogram - but the vertical scale is marked with relative frequencies instead of actual frequencies






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






44. A visual exploratory data analysis technique that shows the shape of a distribution - this kind of display uses the actual values of the variable to present the shape of the distribution of data values






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






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






47. Always use a equal symbol






48. 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).






49. 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






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