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






2. Sample proportion






3. 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






4. 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






5. Information about individuals in a population






6. Statistics






7. Mu; population mean






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






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






10. Collection of information from the whole population






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






12. Alternative hypothesis






13. Capital sigma; summation






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






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






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






17. Collection of information from a sample






18. Sample mean






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






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






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






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






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






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






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






26. 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






27. Population variance






28. Always use a equal symbol






29. 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






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






31. _______________ 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






32. Population size






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






34. Sum of the values






35. Lowercase sigma; population standard deviaition






36. 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






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






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






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






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

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41. Sample size or number of trials






42. Null hypothesis






43. A numerical quantity measuring some aspect of the population






44. Complement of p






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






46. 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






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






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






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






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