Assume that the readings on the thermometers are normally distributed with a mean of 0 degrees and standard deviation of 1.00 degrees C. A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to p subscript 99, the percentile. This is the temperature reading separating the bottom 99% from the top 1%
1 answer
http://davidmlane.com/hyperstat/z_table.html