Lecture 28
Qi Wang, Department of Statistics
Oct 29, 2018
Suppose that a continuous random variable, X, has the probability density function (PDF) given below: \[ f_X(x)=\left\{ \begin{array}{ll} c(x^2 + 4x + 4), 0 \le x \le 2\\ 0, otherwise \end{array} \right. \]
The average lifetime of acertain type of light bulb is 500 hours. Assume that if the current light bulb burns out, it will get changed immediately. Please answer the following questions.
A certain component that your company manufactures has a weight that varies evenly from 59 grams to 75 grams. Each of these manufactured components is independent of the others.
Suppose that you have a box containing 50 balls, 35 of which are black. The rest are red.