Assume that the readings of inexpensive thermometers for the temperature of the freezing point of water are no

Question

Assume that the readings of inexpensive thermometers for the temperature of the freezing point of water are normally distributed, and have a mean of 0 degree C and a standard deviation of 1 degree C. Find the indicated probability where z is a reading in degrees Celsius. P(-1.80 < Z < 1.80)

Answer 1

1.8 degrees is equal to 1.8 sigma in this case. According to a lookup table, the probability of falling between -1.8 and +1.8 sigma is 92.8%.