Reference no: EM131264335
Topics: Probability and Probability Distributions
Exercise 1 - Concepts and definitions.
(a) What is a normal distribution?
(b) What is its usefulness?
(c) What is the standard normal distribution?
(d) What is it usefulness?
Exercise 2 - The lifetime of light bulbs is known to be normally distribution with μ = 100 h and σ = 8h. What is the probability that a bulb picked at random will have a lifetime between 110 and 120 burning hours?
Example 1- Let's keep μ = 10 and generate two curves, one with σ = 2, and another with σ = 1, the normal functions have the following shapes:
![1354_Figure.png](https://secure.expertsmind.com/CMSImages/1354_Figure.png)
The area under the curve for each normal distribution, f(x) and g(x) in the figure here above, is of course equal to 1.