math

PRE-CLASS ASSIGNMENT –EXPECTED VALUE & STATSITICS

Read through sections 8.in your textbook. Be prepared to answer questions in class based on the problems below.

1) Define:

a) Probability Distribution Table:

b) Expected Value:

2) You toss two coins and want to count the number of heads.

a) List out the sample space for tossing 2 coins:

b) If we let x = # of heads you see, it is possible that you get no heads (x = 0),

1 head (x = 1) or 2 heads (x = 1). Complete the probability distribution chart below by looking at the sample space you created above and figuring out the various probabilities.

x	0	1	2
P(x)

c) What happens when you add up all of the probabilities?

3) What is the formula for Expected Value?

4) Using the chart you filled out in (2b), find the expected value for getting heads when tossing two coins.

Read through sections 9.1 and 9.2 in your textbook. Be prepared to answer questions in class based on the problems below.

5) Define:

a) Mean:

b) Median:

c) Mode:

d) Range:

6) Given the data 7, 8, 8, 10, 12, 9, 11, find the:

a) mean:

b) median:

c) mode:

d) range:

7) In your opinion, which measure of central tendency is a better representation of the data and why?