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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. Standard scores and percentile






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






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






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






5. Represents categories - and is nonnumerical in nature






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






7. 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).






8. Type of bar graph that shows frequency distributions






9. Null hypothesis






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






11. Alternative hypothesis






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






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






14. Range - standard deviation and variance.






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






16. A numerical quantity measuring some aspect of the population






17. _______________ 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






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






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






20. 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






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






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






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






24. 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






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






26. 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






27. 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






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






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






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






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






32. 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






33. Probability of event A






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






35. Complement of p






36. Sample proportion






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






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

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39. Collection of information from a sample






40. Population variance






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






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






43. Sample mean






44. Capital sigma; summation






45. Test use normalcdf(ZTS -999)






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






47. Type II error is measured






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






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






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