Test your basic knowledge |

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






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






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






4. Is a sample containing similar characteristics of the population






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






6. Range - standard deviation and variance.






7. 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






8. The number of times each data value occurs






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






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






11. Collection of information from a sample






12. Type II error is measured






13. 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






14. 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.






15. 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






16. Sample mean






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






18. Population is organized into groups (i.e - neighborhoods/departments) - and sampling unit is selected by a simple random sample






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






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






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






22. Sum of the values






23. Sample standard deviation






24. 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






25. Is the process of using SAMPLE INFORMATION to draw inferences or conclusions about the POPULATION






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






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






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






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






30. Test use normalcdf(ZTS -999)






31. Sample variance






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






33. Population proportion






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






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






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






37. Always use a equal symbol






38. Level of measurement- Involves data that may be arranged in some order - but differences between data values either cannot be determined or are meaningless. (Example) Questions on a survey are scored with integers 1 thru 5 with 1 representing strong






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






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






41. The level of significance and the probability of a type I error (rejecting a true null hypothesis). The area in the tail or tails of a distribution (z - t - or ?2); in hypothesis testing you don't always have a two tailed distribution as in confidenc






42. 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






43. A numerical quantity measuring some aspect of the population






44. Probability of event A






45. One extreme value can affect it dramatically.






46. 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






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






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






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






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