A popular theory is that presidential candidates have an advantage they are taller than their maino long with the heights of their main opponentsCompleto parts (a) and pponents centimeters) randomly Height (cm) of President 181 178 176 179 194 175 Height (cm) of Main Opponent 165 171 173 172 181 180 the sample data with a 0:01 significance level to the claim that the for and main , the differences have than 0 cm the height this example y_{4} the mean value of the for the population of all pairs of datawhere each main opponent's heightWhat the and hypotheses the H 0 * P 0 [ | nabla nabla || Type or not round)