Test your basic knowledge |

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






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






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






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






5. Lowercase sigma; population standard deviaition






6. 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






7. 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






8. _______________ 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






9. 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






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






11. 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






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






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






15. 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






16. Population variance






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






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






20. Parameter






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






22. Standard scores and percentile






23. Represents categories - and is nonnumerical in nature






24. 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).






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






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






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






28. Complement of p






29. Mean - mode - median and midrange.






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






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






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






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






34. Alternative hypothesis






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






36. Collection of information from the whole population






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






38. 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






39. Null hypothesis






40. 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






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






42. 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.






43. Type of bar graph that shows frequency distributions






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






45. Sample size or number of trials






46. Information about individuals in a population






47. Test use normalcdf(ZTS -999)






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






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

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183


50. A numerical quantity measuring some aspect of the population