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






2. 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






3. The number of times each data value occurs






4. Sample mean






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






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






7. Create a sample by using data from population members that are readily available






8. _______________ 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






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






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






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






12. Population proportion






13. 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






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






15. Range - standard deviation and variance.






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. 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).






18. Test use normalcdf(ZTS -999)






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






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






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






22. Population variance






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






24. 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.






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






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






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






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






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






30. Mean - mode - median and midrange.






31. Sample proportion






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

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33. Represents categories - and is nonnumerical in nature






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






35. Statistics






36. Members of the population select themselves by volunteering






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






38. One extreme value can affect it dramatically.






39. Population size






40. Capital sigma; summation






41. Null hypothesis






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






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






44. Collection of information from a sample






45. Parameter






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






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






48. Type of bar graph that shows frequency distributions






49. 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






50. 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







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