Fire safety includes smoke detectors that warn residents about fires. According to a 2002 US nationwide survey, about 94% of households report having a smoke detector. A firefighter believes this value is too high. He looks through an independent random sample of fire records in his department. Of the 86 households examined, 67 had a smoke detector in the house. Compute a 95% confidence interval for the proportion of houses with fire detectors. Use the form "from lower bound to upper bound." Round to 3 decimal places