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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. Statistics






2. Population size






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






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






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






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






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






8. Members of the population select themselves by volunteering






9. 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






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






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






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






13. Mu; population mean






14. 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






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






16. Complement of p






17. Test use normalcdf(ZTS -999)






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






19. Sample variance






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






21. Capital sigma; summation






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






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






24. 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






25. Type of bar graph that shows frequency distributions






26. Sample mean






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






28. Range - standard deviation and variance.






29. 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






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






31. Sample size or number of trials






32. Mean - mode - median and midrange.






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






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






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






36. The important aspects of the data are called?






37. Standard scores and percentile






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






39. Population proportion






40. Parameter






41. Lowercase sigma; population standard deviaition






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






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






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






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






46. 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






47. 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.






48. 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






49. Represents categories - and is nonnumerical in nature






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