Recently, two students made headlines by spinning a certain type of coin 270 times and getting 162 heads—that's 60%. That makes the 90% confidence interval (55%,65%). What does this mean? Are the conclusions in parts a through b correct? Explain your answers. a. Between 55% and 65% of all coins of that type are unfair.
b. We are 90% sure that in this experiment this coin landed heads between 55% and 65%of the spins.