Question

Question 15 Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of OC and a standard deviation of 1.00*C. A single thermometer is randomly selected and tested. Let Z represent the reading of this thermometer at freezing. What reading separates the highest 3.18% from the rest? That is, if P(Z > c) = 0.0318, finde °C C

Answer 1

1. P(Z > c) = 0.0318 3 P(Z <c) = 0.9682 3 c=1.8549 2. now we must choose - 0.9 in the box "left of a value" 3. Now, we want cs.t. P(Z > c) = 0.25 P(Z <c) = 0.75 so, we get c= 0.6744, so we must write 0.6744 in the box named "left of a value."