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(b) Draw and label the box plot (by hand) for this data set. Are there any outliers? Explain. 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 68 79 78 90 105 1 12 103 85 62 Trucks(x) 190 212 231 237 290 320 348 308 245 201 Ali, being the friendly statistician that he is, prepared the table below to summarize some of the data for you. 10 10 10 yi = 842 xiyi = 226238 x7 = 693468 10 Sy ~ 18.256201 y = 84.2 y7 = 73896 1=1 (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. (c) Find the least-squares regression line, or the best fitting line, for these data. (d) Predict the noise level for a night where there are 250 trucks occupying downtown Ottawa