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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. Parameter






2. A numerical quantity measuring some aspect of the population






3. Sum of the values






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


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






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






7. The important aspects of the data are called?






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






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






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






11. Capital sigma; summation






12. 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






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






14. 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






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






16. 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






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






18. 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






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






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






21. Sample mean






22. 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).






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






24. Information about individuals in a population






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






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






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






28. Mu; population mean






29. 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






30. Population proportion






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






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






33. Probability of event A






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






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






36. 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.






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






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






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






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






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






42. Collection of information from a sample






43. 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






44. 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






45. Sample variance






46. Standard scores and percentile






47. Range - standard deviation and variance.






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






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






50. Test use normalcdf(ZTS -999)