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






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






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






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






5. 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






6. Collection of information from a sample






7. Complement of p






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

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






10. Represents categories - and is nonnumerical in nature






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






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






13. The number of times each data value occurs






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






15. Members of the population select themselves by volunteering






16. Test use normalcdf(ZTS -999)






17. Mu; population mean






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






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






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






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






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






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






24. Sample variance






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






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






27. Population variance






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






29. Parameter






30. Lowercase sigma; population standard deviaition






31. An efficient method of graphing information using actual amounts: clusters - gaps - outliers are clearly identified.






32. One extreme value can affect it dramatically.






33. Alternative hypothesis






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






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






36. Sum of the values






37. 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






38. Range - standard deviation and variance.






39. Information about individuals in a population






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






41. 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).






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






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






44. Sample proportion






45. Statistics






46. Sample size or number of trials






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






48. Probability of event A






49. 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






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






Can you answer 50 questions in 15 minutes?



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