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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. Sample standard deviation






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






3. Sample size or number of trials






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






5. Capital sigma; summation






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






7. Represents categories - and is nonnumerical in nature






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






9. Mu; population mean






10. Always use a equal symbol






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






12. Members of the population select themselves by volunteering






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






14. Sample mean






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






16. Collection of information from the whole population






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






18. A numerical quantity measuring some aspect of the population






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






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






21. The number of times each data value occurs






22. 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






23. Population size






24. Parameter






25. 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






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






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






28. 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






29. Type II error is measured






30. Sample proportion






31. Statistics






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






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






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






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






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






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






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






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






40. 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






41. Collection of information from a sample






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






43. _______________ 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






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






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






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






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






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. 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






50. Test use normalcdf(ZTS -999)