1.  90% of adults are older than average

Suppose the city has only 10 people in it.  Here are their names and ages.  Find the percentage of people who are older than the average age.

Abe 50, Mary 30, Bob 50, Lily 50, Mike 50, Carl 50, Sue 50, Jim 50, Lisa 50, Steve 50

Group of answer choices

2%

48%

95%

90%

2. DISCUSSION - Which disaster is more likely?

Which disaster is more likely?

A large flood in Japan in which more than 1000 people die.

A large flood in Japan caused by an earthquake in which more than 1000 people die.

Hint: There are more ways for a flood to happen than a flood caused by an earthquake.  

Group of answer choices

not enough information to decide

equal probabilities

A large flood in Japan caused by an earthquake in which more than 1000 people die.

A large flood in which more than 1000 people die

3. DISCUSSION - Averages aren't always enough

A statistician had one foot in a bucket of ice water and one foot in a bucket of boiling water.   He said, "My feet feel great, on the average."   What other measure of temperature data would be useful in describing the statistician's situation?

Group of answer choices

correlation coefficient

standard deviation, which will measure the amount of variation among temperatures

nothing else is needed

median, will measure the middle value

4. DISCUSSION - Random samples

When you're  using sample data to describe a population, why is it important to use a random sample?

Group of answer choices

eliminates bias

eliminates random variation

easier than anything else

eliminates randomness

5. DISCUSSION - Drowning in a shallow lake

Someone drowned in a lake whose average depth was 2 feet.  How is that possible?

Group of answer choices

It's impossible to drown in a lake whose average depth is two feet.

not enough information to decide

The lake had a deep part and a shallow part. The person drowned in the deep part.

No answer text provided.