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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. The number of times each data value occurs






2. _______________ 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






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






4. The important aspects of the data are called?






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






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






7. Always use a equal symbol






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






9. Sum of the values






10. Represents categories - and is nonnumerical in nature






11. Mean - mode - median and midrange.






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






13. Probability of event A






14. Sample variance






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






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






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






18. Sample proportion






19. 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






20. Sample standard deviation






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






22. 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






23. Is a sample containing similar characteristics of the population






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






25. Members of the population select themselves by volunteering






26. 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).






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






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






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. 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






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






32. 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






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






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






35. Collection of information from a sample






36. 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






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






38. 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






39. Parameter






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






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






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






43. Population proportion






44. Type II error is measured






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






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






47. Null hypothesis






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






49. Complement of p






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