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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 method in which each combination of people has an equal chance of being selected- the sample is representative of the population and is independent






2. The number of times each data value occurs






3. Is a number that describes a characteristic of a sample

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






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






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






7. Population variance






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






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






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






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






12. Sample variance






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






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






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






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






17. Null hypothesis






18. 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).






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






20. Range - standard deviation and variance.






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






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






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






24. Complement of p






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






26. Sample size or number of trials






27. 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






28. Alternative hypothesis






29. 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






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






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






32. 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






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






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






35. Type II error is measured






36. 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






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






38. Mu; population mean






39. Sample standard deviation






40. Is a sample containing similar characteristics of the population






41. Statistics






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






43. The important aspects of the data are called?






44. Represents categories - and is nonnumerical in nature






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






46. Standard scores and percentile






47. 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






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






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






50. 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.