Suppose a brand of lightbulbs is even distributed, with a mean life of 1,300hr and a standard deviation of 100h. What is the probability that a light bulb of that brand would last between 1180 and 1480 hr
Suppose a brand of lightbulbs is even distributed, with a mean life of 1,300hr and a standard deviation of 100h. What is the probability that a light bulb of that brand would last between 1180 and 1480 hr