STATISTICS PORTAGE CNSL 503 PRACTICE EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS | ALREADY GRADED A+RECENT VERSION

STATISTICS PORTAGE CNSL 503 PRACTICE EXAM QUESTIONS WITH CORRECT DETAILED ANSWERS | ALREADY GRADED A+RECENT VERSION 1. frequency distribution - ANSWER presents the frequency of every value in a dataset 2. frequency tables - ANSWER displays the number of times (ex: frequency) a certain value appears within the dataset in a table format 3. What does each column represent in frequency tables? - ANSWER one column represents the category, the other column represents the frequency 4. absolute frequency - ANSWER raw count 5. What type of frequency do you use when answering " how many student out of the total number of students scored a letter grade?"? - ANSWER relative frequency 6. relative frequency - ANSWER the ratio between the absolute frequency of a category and the total frequency 7. formula for relative frequency - ANSWER frequency in category/total frequency 8. What type of frequency do you use when answering the question "how many students scored a B or better?"? - ANSWER cumulative frequency 9. cumulative frequency - ANSWER the sum of frequencies of all preceding categories 10. Frequency tables can be used for what type of variables? - ANSWER qualitative or quantitative variables 11. When using frequency tables for quantitative variables, group the quantitative scores into groups called what? - ANSWER bins 12. frequency graphs - ANSWER pie charts, bar charts, histograms, frequency polygons, stem and leaf plots 13. What type of frequency graphs are used for qualitative variables? - ANSWER pie charts and bar charts 14. What type of frequency graphs are used for quantitative variables? - ANSWER histograms, frequency polygons and stem and leaf plots 15. pie charts - ANSWER displays relative frequencies (and not necessarily absolute frequencies) of each category for qualitative variables in a pie 16. Each portion of a pie represents... - ANSWER a different category 17. The size of each portion is proportional to... - ANSWER the relative frequency of that category 18. The entire pie represents... - ANSWER 100% of the scores 19. Pie charts are good to visualize... - ANSWER frequencies 20. Pie charts are only useful for... - ANSWER small number of categories 21. bar charts/bar graphs - ANSWER display absolute and relative frequencies of qualitative data using bars 22. Each bar represents a - ANSWER category 23. The height of a bar represents... - ANSWER the frequency 24. Do the bars touch in a bar graph? - ANSWER no 25. histograms - ANSWER displays absolute and relative frequencies of quantitative data using bars 26. Each bar represents... - ANSWER a category 27. The height of the bar represents... - ANSWER the freuqeuncy 28. Do the bars in a histogram touch? - ANSWER yes 29. The width of the bars represent... - ANSWER the size of the range of values 30. frequency polygons - ANSWER display absolute and relative frequencies of quantitative data using dots and lines 31. Each dot is placed... - ANSWER above the score an the height of the frequency 32. The dots are connected with a line that begins and ends at... - ANSWER zero frequency 33. stem and leaf plot - ANSWER display frequencies of quantitative data, particularly when the dataset is small 34. The stem represents... - ANSWER the first digits of the score 35. The leaf consists of... - ANSWER he last digit of the score 36. The length of the leaf represents... - ANSWER the frequency of the category 37. 3D graphs don't add any information when... - ANSWER the data is 2D 38. 3-dimensional graphs - ANSWER use when data is measured on 3 different axis' 39. What type of graph should you use when studying CO2 emissions on function of year and country? - ANSWER 3-dimensional graph 40. mode - ANSWER the value with the highest frequency 41. The mode is shown by... - ANSWER the number of peaks in a graph 42. Unimodal distributions have ____ peaks and ____ modes. - ANSWER 1;1 43. Bimodal distributions have ____ peaks and ____ modes. - ANSWER 2;2