# Review Problems

## Introductions

Introduce yourselves!

*Icebreaker:* What are you doing this weekend?

## Groupwork

If a particular set of data is normally distributed, you would find that approximately (check all that apply):

2 of every 3 observations would fall within 1 standard deviation of the mean.

19 of every 20 observations would fall within 2 standard deviations of the mean.

The standard error would be smaller for 3 observations than it would be for 20 observations.

The more observations you took, the lower the sample standard deviation would be.

What is a confidence interval? Give an example.

What is the size of confidence interval based on?

## Hand-in

Have ONE person from each group submit the group's answers:

https://wpi.qualtrics.com/jfe/form/SV_07EQhqb2H3xojps

Make sure to include the names of all group members.

Happy reviewing!

-- Mark