Assignment:
Lightbulbs manufactured by a particular company have an exponentially distributed life with mean 100 hours.
a. What is the probability that the lightbulb I am now putting in will last at least 65 hours?
b. What is the standard deviation of the lifetime of a lightbulb?
Your answer must be typed, double-spaced, Times New Roman font (size 12), one-inch margins on all sides, APA format and also include references.