Te weights (in pounds) of 30 randomly selected boy students from a high school are given below. 181 168 150 175 174 154 156 187 161 162 173 163 164 168 147 170 170 163 173 153 174 175 150 175 176 177 178 143 186 157 a. find a 95% confdence interval for σ . 2 b. based on the confdence interval from part (a), what would be your decision for the test : 100 0 2 h σ = versus h1 : σ ≠ 100 2 at the level of α = 0.05? c. find the p-value of the test