Statistics Unit Two Milestone Questions and Answers Latest Updated 2022

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ou passed this Milestone 21 questions were answered correctly. 5 questions were answered incorrectly. 1 For a class reading competition, the students were asked to read a book. Mike, Jack, and Rayon discussed the numbers of pages they read on the first day. One of them made a graph to represent the data. Who made the graph, and why? Rayon, because he wanted to make the amount read by each person appear very different. Jack, because he wanted to make it look like he read significantly more than the others. 6/29/2020 Sophia :: Welcome https://www.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/4317780 2/21 Mike, because he wanted to make the amount read by each person appear reasonably close. Mike, because he wanted to accurately show the amount read by each person. RATIONALE Since there was a competition, the person who most likely made this graph would want to represent themselves favorably. Since Jack has the most pages, it would probably be him. CONCEPT Misleading Graphical Displays 2 In which of these cases should the mean be used? When the data is left-skewed When the data is symmetric When the data has extreme values When the data is right-skewed RATIONALE Since the mean uses the actual values in the data, it is most affected by outliers and skewness. So, we only want to use the mean when the data is symmetric as a measure of centrality. When the data is skewed, the median is a better measure. CONCEPT Measures of Center 3 A fast-food restaurant gave a “Customer Satisfaction Survey” in which 1500 customers rated how satisfied they were with service. The results are shown below as a table. Rating Frequency Extremely Satisfied 234 Satisfied 443 6/29/2020 Sophia :: Welcome https://www.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/4317780 3/21 Rating Frequency Neutral 246 Dissatisfied 203 Extremely Dissatisfied 374 The relative frequency of people who were dissatisfied with the service is __________. 20.3% 29.5% 38.5% 13.5% RATIONALE To get the relative frequency, we take the frequency of the value and divide it by the total number. So in this case for strongly dissatisfied, the relative frequency would be: CONCEPT Frequency Tables 4 Sara wonders what percentage of her students answered at least half of the quiz questions incorrectly. 6/29/2020 Sophia :: Welcome https://www.sophia.org/spcc/introduction-to-statistics-2/milestone_take_feedbacks/4317780 4/21 The relative cumulative frequency of students who earned a score of 20 or lower on the quiz is __________ . 68% 28% 14% 34% RATIONALE To get the relative frequency of 20 or lower, we need to find the cumulative number of 20 or less. We simply add up any bin that has the number 20 or less, such as the bin that shows scores of 1-5, 6-10, 11-15, and 16-20. This would b

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