The major types of bias in the observation bias group include recall bias, interviewer bias, follow-up bias and misclassification bias. Confounding is sometimes referred to as the third major class of bias. It is a function of the complex interrelationships between various exposures and disease.
Today's mortgage rates - April 20, 2017. Mortgage rates barely moved this week, but did decline just enough for 30-year rates to reach new lows for 2017. According to Freddie Mac, the average conforming 30-year fixed-rate mortgage shed two basis points (0.02 percent) to slide to 4.08 percent. Fifteen-year fixed rate mortgages eased a similar amount, with that .02 decline good enough to tie a low for the year.
Mortgage Rates History 1980 through 2016. National Average Contract Mortgage Rate: The National Average Contract Mortgage Rate is derived from the Federal Housing Finance Board's Monthly Interest Rate Survey (MIRS). Prior to October 1989, this survey was conducted for many years by the former Federal Home Loan Bank Board (FHLBB).