2. [8 marks] Over the last ten (10) days, a number of trucks have occupied downtown Ottawa, and annoying downtown reside

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2 8 Marks Over The Last Ten 10 Days A Number Of Trucks Have Occupied Downtown Ottawa And Annoying Downtown Reside 1 (73.08 KiB) Viewed 68 times

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2. [8 marks] Over the last ten (10) days, a number of trucks have occupied downtown Ottawa, and annoying downtown residents by honking their horns. Wayne measured noise, in decibels, two blocks from Parliament Hill, and Paul counted the number of trucks he saw daily on his nightly walk. The data are shown in the table below. Noise (y) 60 Trucks(x) 190 68 212 79 231 78 237 90 290 105 320 112 348 103 308 85 245 62 201 Ali, being the friendly statistician that he is, prepared the table below to summarize some of the data for you. 10 10 10 3 Yi = 842 Xiyi = 226238 i=1 3 x = 693468 i=1 i=1 10 Sy 18.256201 y = 84.2 y? = 73896 (a) Calculate the mean and variance of the number of trucks that Paul counted over the ten (10) days. (b) Calculate and interpret the correlation coefficient.