1.In 15 minutes, an average of 3 birds visit our bird feeder. Let X be the number of birds that visit in an hour. What is the value of for this Poisson distribution?

2.We've listed 112 paintings for auction. There is an 85% chance that any individual painting will sell. What is the probability that we sell more than 100 paintings? You can use a normal curve to approximate the answer.

3.Eleven children are hiding in a game of hide-and-seek. The seeker will find a hider 70% of the time. If X is the number of children she will find, what is the value of P(X > 9)?

4.The state of Texas has executed 569 people since 1982. If Texas courts have a wrongful conviction rate of 3%, what is the expected value number of innocent people executed?

3

8

1

17

0

5.

5.We will test 10 bungee cords. Four of them are going to fail. How many ways can we choose which 4 fail?

6.The distribution of a random variable is given by the following table.

Value Probability

0 .1000

1 .1500

2 .2000

3 .2500

4 .1700

5 .1300

Find P(X < 4).

.1700

.7000

.4500

.8700