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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. Population size






2. 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






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






4. Level of measurement- Is the interval level modified to include the inherent zero starting point (where zero indicates that none of the quantity is present). For values at this level - differences and ratios are both meaningful. (Example) Ages of sur






5. Sample proportion






6. Collection of information from a sample






7. 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






8. Null hypothesis






9. Capital sigma; summation






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






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






12. Occur when one of them affects the probability of the other.






13. Sample variance






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






15. Population proportion






16. 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).






17. 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






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






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






20. Members of the population select themselves by volunteering






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






22. Sample standard deviation






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






24. 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






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






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






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






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






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






30. 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






31. A numerical quantity measuring some aspect of the population






32. Represents categories - and is nonnumerical in nature






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






34. 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






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






36. Sample mean






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






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






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






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






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






42. Parameter






43. Standard scores and percentile






44. Is the portion of the population that is selected for study






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






46. 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.






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






48. Complement of p






49. Test use normalcdf(ZTS -999)






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