Tonight please complete the "AP Stat Stamp" worksheet (but it's not really a stamp) about the % of females in the labor force (provided in class or below). 

• Be sure to complete the full process! Conditions, math, interpret your interval
• Use 95% confidence (so we all get the same answers)
• Write everything/show all work as you would on the AP exam to earn (full) hw credit!

If you feel like getting ahead, at some point we will have the problem below for homework--go ahead and complete this on separate paper if you like!

• If for some reason we did not have this as homework I will count it as extra credit...

Today's Class Recap:

• Stamp = creating a confidence interval! (math and interpret)
• Went over stamp
• How do we show the "math" work on the AP exam (with the CI formula)?
• Ch. 19 Notes: the CI formula and critical values
• What is a critical value (z*)?
• How do we find the value of z* for a given confidence level using....
• invnorm
• T-table (provided in class)
• How is a confidence interval calculated? (breaking down the formula)
• Connect to formula sheet
• What is margin of error?