Suppose that a brand of lightbulb lasts on average 1981 hours with a standard deviation of 133 hours. Assume the life of the lightbulb is normally distributed. Calculate the probability that a particular bulb will last from 1843 to 2188 hours? P(1843 < X < 2188) = Enter your answer as a number accurate to 4 decimal places. *Note: all z-scores must be rounded to the nearest hundredth.