# Calculating the mean yearly value

. Calculate the mean yearly value using the average gas prices by month found in the “Final Project Data Set.” 2. Using the years as your x-axis and the annual mean as your y-axis, create a scatterplot and a linear regression line. 3. Answer the following questions using your scatterplot and linear regression line: o What is the slope of the linear regression line? o What is the Y-intercept of the linear regression line? o What is the equation of the linear regression line in slope-intercept form? o Based on the linear regression line, what would be an estimated cost of gas in the year 2020? o What are the residuals of each year? o Select a current price that you have seen or paid recently for gas. Is that price within the range of the linear regression line or is it an outlier? Is it within the confidence interval of 5% or either end? Series Id: APU000074714 Area: U.S. city average Item: Gasoline, unleaded regular, per gallon/3.785 liters Years: 1982 to 2011 Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual 1982 1.358 1.334 1.284 1.225 1.237 1.309 1.331 1.323 1.307 1.295 1.283 1.26 1.296 1983 1.23 1.187 1.152 1.215 1.259 1.277 1.288 1.285 1.274 1.255 1.241 1.231 1.241 1984 1.216 1.209 1.21 1.227 1.236 1.229 1.212 1.196 1.203 1.209 1.207 1.193 1.212 1985 1.148 1.131 1.159 1.205 1.231 1.241 1.242 1.229 1.216 1.204 1.207 1.208 1.202 1986 1.194 1.12 0.981 0.888 0.923 0.955 0.89 0.843 0.86 0.831 0.821 0.823 0.927 1987 0.862 0.905 0.912 0.934 0.941 0.958 0.971 0.995 0.99 0.976 0.976 0.961 0.948 1988 0.933 0.913 0.904 0.93 0.955 0.955 0.967 0.987 0.974 0.957 0.949 0.93 0.946 1989 0.918 0.926 0.94 1.065 1.119 1.114 1.092 1.057 1.029 1.027 0.999 0.98 1.022 1990 1.042 1.037 1.023 1.044 1.061 1.088 1.084 1.19 1.294 1.378 1.377 1.354 1.164 1991 1.247 1.143 1.082 1.104 1.156 1.16 1.127 1.14 1.143 1.122 1.134 1.123 1.140 1992 1.073 1.054 1.058 1.079 1.136 1.179 1.174 1.158 1.158 1.154 1.159 1.136 1.127 1993 1.117 1.108 1.098 1.112 1.129 1.13 1.109 1.097 1.085 1.127 1.113 1.07 1.108 1994 1.043 1.051 1.045 1.064 1.08 1.106 1.136 1.182 1.177 1.152 1.163 1.143 1.112 1995 1.129 1.12 1.115 1.14 1.2 1.226 1.195 1.164 1.148 1.127 1.101 1.101 1.147 1996 1.129 1.124 1.162 1.251 1.323 1.299 1.272 1.24 1.234 1.227 1.25 1.26 1.231 1997 1.261 1.255 1.235 1.231 1.226 1.229 1.205 1.253 1.277 1.242 1.213 1.177 1.234 1998 1.131 1.082 1.041 1.052 1.092 1.094 1.079 1.052 1.033 1.042 1.028 0.986 1.059 1999 0.972 0.955 0.991 1.177 1.178 1.148 1.189 1.255 1.28 1.274 1.264 1.298 1.165 2000 1.301 1.369 1.541 1.506 1.498 1.617 1.593 1.51 1.582 1.559 1.555 1.489 1.510 2001 1.472 1.484 1.447 1.564 1.729 1.64 1.482 1.427 1.531 1.362 1.263 1.131 1.461 2002 1.139 1.13 1.241 1.407 1.421 1.404 1.412 1.423 1.422 1.449 1.448 1.394 1.358 2003 1.473 1.641 1.748 1.659 1.542 1.514 1.524 1.628 1.728 1.603 1.535 1.494 1.591 2004 1.592 1.672 1.766 1.833 2.009 2.041 1.939 1.898 1.891 2.029 2.01 1.882 1.880 2005 1.823 1.918 2.065 2.283 2.216 2.176 2.316 2.506 2.927 2.785 2.343 2.186 2.295 2006 2.315 2.31 2.401 2.757 2.947 2.917 2.999 2.985 2.589 2.272 2.241 2.334 2.589 2007 2.274 2.285 2.592 2.86 3.13 3.052 2.961 2.782 2.789 2.793 3.069 3.02 2.801 2008 3.047 3.033 3.258 3.441 3.764 4.065 4.09 3.786 3.698 3.173 2.151 1.689 3.266 2009 1.787 1.928 1.949 2.056 2.265 2.631 2.543 2.627 2.574 2.561 2.66 2.621 2.350 2010 2.731 2.659 2.78 2.858 2.869 2.736 2.736 2.745 2.704 2.795 2.852 2.985 2.788

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