B. General Electric manufactures a decorative Crystal Clear 60-watt light bulb that it advertises will last 1400 hours. Suppose that the lifetimes of the light bulbs are approximately normally distributed, with a mean of 1550 hours and a standard deviation of 57 hours. 1. Fill in the blank: X~N( ISO ,i} 2. What is the probability that a randomly selected GE Crystal Clear 60 watt light bulb will last 1400 hours? - Include the P notation. - Answer in a complete sentence. [Ans1 (l 5"? The probability that a randomly selected GE Crystal Clear 60watt light bulb will last 1400 Hours is 0.0043. _ wuo pm Page 3 of 4 .0043] Z: Intro to Stat 1 (STAT-14S) l .0q '3' O \\ In-Ciass Assignment 12: Normal Distribution ' ' 3. Determine the middle 90% of all GE Crystal Clear 60watt light bulbs that will last in a number of hours. - Round answer to the nearest whole number. - Include the P notation. - Answer in a complete sentence. [Ans1 1456 and 1644 D X'l' +7, CT WEI? _, )' I550 13 E