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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. Information about individuals in a population






2. 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






3. Population size






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






5. 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.






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






7. 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






8. One extreme value can affect it dramatically.






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






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






11. The important aspects of the data are called?






12. Null hypothesis






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






14. 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






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






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






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






18. 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






19. Sample proportion






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






21. Probability of event A






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






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






24. 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






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






26. Complement of p






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






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






29. Type of bar graph that shows frequency distributions






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






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






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






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






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

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35. Population proportion






36. 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






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






38. 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






39. Type II error is measured






40. Range - standard deviation and variance.






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






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






43. Sample size or number of trials






44. Sample variance






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






46. Collection of information from the whole population






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






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






49. Statistics






50. The number of times each data value occurs