She can read 55 pages per hour So, divide that by 2 to get 27.5 She can read 27.5 pages in the next 30 Min. (She would be on page 137.5 :p) Hope this helps!!
Let p be the true proportion of US adults who believe raising the minimum wage will help the economy. A point estimate for p is and a good aproximation (because we have a large sample) for the standard deviation of is . Therefore, a 99% confidence interval for p is given by where and is the th quantile of the standard normal distribution, so we have, , i.e., or equivalently (0.3798, 0.4602).