[1] 6. MDM 4U1 The following circle graph represents data from 1500 people. The sector angle for category C is 154. Determine the frequency of category C. A Circle Graph [2] 7. The following graph illustrates the increase in trash use. Explain why this graph is misleading? [3] 8. Winning Time (h) 300 250 Trash 200 160 100 50 1960 1980 2000 Draw an approximate line of best fit on the following scatter plot. Predict the winning Olympic marathon time in the year 2020. How valid is this prediction? Explain. Olympic Marathon Times 3:40 3:30 3:20 3:10 3:00 2:50 2:40 2:30 2:20 2:10 2:00 1:50 1880 1900 1920 1940 1960 1980 2000 2020 Year 13. For the data in the table, use alcula.com to create a scatter plot. x y 3 2 a) Determine the correlation coefficient and determination coefficient for this data. (2 marks) 2 1 15 27 8 15 13 21 c) State the regression line equation for this data (1 mark) 8 12 15 26 d) What would the corresponding y value be when x is 90? (1 mark) Part D: Thinking/Inquiry - 5 marks 1. You recently watched the documentary "The Joy of Statistics" with Hans Roslin. a) How did Professor Roslin present his world health statistics to make them accessible to non-Statisticians? What was the main idea of his presentation?[3] b) Why do you think an individual understanding of the presentation of statistics is important to society in general? [2] Page 10 of 10 WHAT'S FREAKING US OUT HERE IS THAT WE'VE FOUND A CORRELATION BETWEEN OWNING CATS AND BEING STRUCK BY LIGHTNING