Q:Question:order to estimate the mean 30-year fixed mortgage rate for a home loan in the United States, a random sample of 22 recent loans is taken. The average calculated from this sample is 4.80 %. It can be assumed that 30 -year fixed mortgage rates are normally distributed with a population standard deviation of 0.40 %. Compute 95 % and 99 % confidence intervals for the population mean 30 -year fixed mortgage rate. Note: Round your final answers toA:Answer:See a step by step answer