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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. Represents categories - and is nonnumerical in nature






2. 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






3. A numerical quantity measuring some aspect of the population






4. One extreme value can affect it dramatically.






5. 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






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






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






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






9. Sum of the values






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






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






12. 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






13. (largest data value) - (smallest data value)






14. Range - standard deviation and variance.






15. Disjoint events cannot overlap. They are mutually exclusive if they cannot occur at the same time.






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






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






18. Standard scores and percentile






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






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






21. Probability of event A






22. Test use normalcdf(ZTS -999)






23. Type II error is measured






24. Parameter






25. _______________ 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






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






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






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






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






30. The number of times each data value occurs






31. Type of bar graph that shows frequency distributions






32. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.






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






34. A subset of the population- it's important to choose a sample at random to avoid bias in the results






35. 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).






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






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






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






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






40. 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






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






42. Sample proportion






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






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






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






46. Population proportion






47. Sample size or number of trials






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






49. Members of the population select themselves by volunteering






50. Statistics