A simple random sample from a population with a normal distribution of 100 body temperatures has x=98.80 degrees F and s=0.67 degrees F. Construct 80% confidence interval estimate of the standard deviation of body temperature of all healthy humans.

Arefrigeration system at your company uses temperature sensors fixed to read celsius (°c) values, but the system operators in your control room understand only the fahrenheit scale. you have been asked to make a fahrenheit (°f) label for the high temperature alarm, which is set to ring whenever the system temperature rises above –10°c. what fahrenheit value should you write on the label?