1 Compare and contrast the 3 graphs shown at the right. a). How are the graphs s
ID: 3068034 • Letter: 1
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1 Compare and contrast the 3 graphs shown at the right. a). How are the graphs similar? How are they different? What is the most distinctive feature that distinguishes these three graphs from each other? 10 82 84 86 88 90 92 94 96 98 100 Exam Scores Set A b). For each graph, pick a single exam score to summarize the overall performance of the students. In other words, summarize each set of data with one number (i.e., what is typical exam score for each data set?) 10 - 00 82 84 96 88 90 92 94 36 100 Set A Set B Set C Exam Scores Set c). The average score for Set A is 87.4. What do you think 10 the average score is for Set B and for Set C? (See if you can answer this without doing any calculations.) 80 82 84 86 092 94 6 e 100 Exam Seores set c Set B Set C d). Which, if any, of the statements below is a reasonable explanation for the differences in the graphs? Why? The graphs represent different classes. Different groups of students will obviously perform differently on an exam. The graphs represent a single class after the teacher adjusted the grades. The teacher realized that some of the exam questions were not well written, so she adjusted the grades by adding points to the original exam scores. There are no differences in the graphs. They look the same. I. IL. Ill.Explanation / Answer
c. Since the average score for Set A is 87.4, the average score for Set B is 89.4 and the average score for Set C is 91.4 because all the three sets have a difference of 2 points.
d. The correct option is II.
The graphs represent a single class after the teacher adjusted the grades. The teacher realized that some of the exam questions were not well written, so she adjusted the grades by adding points to the original exam scores.
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