🔵 CW603 - DATA

Let's say your only grade right now is an 80. What is your average?

The next day, you make a 100. Now your grades are

80 , 100

What is your average?

So... you started with an 80, scored a 100, and now you have a 90. What rule can you make about averages (means) based on this?

• If my score today is higher than my average, my average goes up.

• My score today does not change my average.

• If my score today is higher than my average, my average goes down.

• My average stays the same no matter what.

But wait! Wednesday comes and you score a 90... winning! It should be 'Wins' day. Now your grades are:

80 , 100 , 90

What is your average?

Wow. You had a 90 average. You scored another 90. Your average did not change. What can you say about a score that is the same as your average?

• If I score the same as my average, it does not change.

• If I score the same as my average, it does not change very much.

• If I score the same as my average, my average goes down.

• If I score the same as my average, my average goes up.

You are on a roll! On Thursday, you score a 94. Your grades are

80, 100, 90, 94

What is your average?

You knew your luck could not hold. You lost your concentration because Ed that sits across from you plays too much. You made a 46 on your work. Your grades are now 80, 100, 90, 94, and 46.

What is your average?

What can a very low score do to a high average?

• It can really hurt!

• No big deal.

• No change at all.

To make matters worse, you just got a zero on your homework. NOW, your grades are:

80 , 100 , 90 , 46, and 0

What is your average now?

• 63

• 74

• 85

• < 0

But, alas, Mr. Jones takes late homework for FULL CREDIT! You turn it in with a grade of 94. Now, your grades are 80 , 100 , 90 , 46, and 94

Now, what is your average?