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






2. Sample standard deviation






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






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






5. Range - standard deviation and variance.






6. 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).






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






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






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






10. Type of bar graph that shows frequency distributions






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






12. Population variance






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






14. Data values that are either much larger or much smaller than the general body of data- they should be included in an analysis unless they are the result of human or other error






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






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






17. Information about individuals in a population






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






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






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






21. Capital sigma; summation






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






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






24. 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






25. Complement of p






26. Parameter






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






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






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






30. Sum of the values






31. 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






32. Population proportion






33. Standard scores and percentile






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






35. _______________ 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






36. Population size






37. Lowercase sigma; population standard deviaition






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






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






40. A numerical quantity measuring some aspect of the population






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






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






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






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






45. Null hypothesis






46. Sample variance






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. Probability of event A






49. The important aspects of the data are called?






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