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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. Type II error is measured






2. Standard scores and percentile






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






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






5. 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.






6. 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






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






8. Sample size or number of trials






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






10. Test use normalcdf(ZTS -999)






11. Members of the population select themselves by volunteering






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






13. Mu; population mean






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






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






16. Is a sample containing similar characteristics of the population






17. Sample standard deviation






18. Sample mean






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






20. Sum of the values






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






22. The important aspects of the data are called?






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






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






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






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






27. Capital sigma; summation






28. 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






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






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






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






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






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






34. One extreme value can affect it dramatically.






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. 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






37. 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






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






39. Alternative hypothesis






40. Double the answer from step 1 or step 2 (on whichever side your test statistics falls).






41. Probability of event A






42. Lowercase sigma; population standard deviaition






43. Range - standard deviation and variance.






44. Sample variance






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






46. Type of bar graph that shows frequency distributions






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






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






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






50. Always use a equal symbol