Round standard deviation and z value to two decimal places. Employ a table for standard normal distribution and give the corresponding areas to four decimal places. Provide your final answer as a percentage rounded to two decimal places.
Seventy-seven percent of L'.S. homes have telephone answering device. In the random sample of 330 homes, find out the probability that more than 70 don't have an answering device? The probability that more than 70 don't have an answering device