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






2. Collection of information from a sample






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






4. Population proportion






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






6. A numerical quantity measuring some aspect of the population






7. Range - standard deviation and variance.






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






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






10. Probability of event A






11. 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.






12. _______________ 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






13. 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






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






15. The important aspects of the data are called?






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






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






18. Statistics






19. Is the process of selecting a portion - or sample - of the entire population






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






21. Population size






22. Sample size or number of trials






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






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






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






26. 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






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






28. 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






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






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






31. 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






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






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






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






35. Represents categories - and is nonnumerical in nature






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






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






38. 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






39. One extreme value can affect it dramatically.






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






41. 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).






42. Sample mean






43. Collection of information from the whole population






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






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






46. 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






47. 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






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






49. Complement of p






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