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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. Probability of event A






2. Represents categories - and is nonnumerical in nature






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






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






5. The important aspects of the data are called?






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






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






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






9. Is a sample containing similar characteristics of the population






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






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






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






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






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






15. Alternative hypothesis






16. Sample variance






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






18. 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






19. 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.






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






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






22. Sum of the values






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






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






25. Mu; population mean






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






27. One extreme value can affect it dramatically.






28. 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






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






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






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






32. 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






33. Information about individuals in a population






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






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






36. Sample proportion






37. Parameter






38. Standard scores and percentile






39. 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).






40. Test use normalcdf(ZTS -999)






41. 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






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






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






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






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






46. 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






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






48. 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






49. Always use a equal symbol






50. _______________ 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